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The comparison of survival between active surveillance or watchful waiting and focal therapy for low-risk prostate cancer:a real-world study from the SEER database 被引量:1
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作者 Qi-Ming Yuan Tian-Hai Lin +6 位作者 Kun Jin Shi Qiu Xiang-Hong Zhou Di Jin Jia-Kun Li Lu Yang Qiang Wei 《Asian Journal of Andrology》 SCIE CAS CSCD 2022年第3期305-310,共6页
To reduce treatment-related side effects in low-risk prostate cancer(PCa),both focal therapy and deferred treatments,including active surveillance(AS)and watchful waiting(WW),are worth considering over radical prostat... To reduce treatment-related side effects in low-risk prostate cancer(PCa),both focal therapy and deferred treatments,including active surveillance(AS)and watchful waiting(WW),are worth considering over radical prostatectomy(RP).Therefore,this study aimed to compare long-term survival outcomes between focal therapy and AS/WW.Data were obtained and analyzed from the Surveillance,Epidemiology,and End Results(SEER)database.Patients with low-risk PCa who received focal therapy or AS/WW from 2010 to 2016 were included.Focal therapy included cryotherapy and laser ablation.Multivariate Cox proportional hazards models were used to compare overall mortality(OM)and cancer-specific mortality(CSM)between AS/WW and focal therapy,and propensity score matching(PSM)was performed to reduce the influence of bias and unmeasured confounders.A total of 19292 patients with low-risk PCa were included in this study.In multivariate Cox proportional hazards model analysis,the risk of OM was higher in patients receiving focal therapy than those receiving AS/WW(hazard ratio[HR]=1.35,95%confidence interval[CI]:1.02–1.79,P=0.037),whereas no significant difference was found in CSM(HR=0.98,95%CI:0.23–4.11,P=0.977).After PSM,the OM and CSM of focal therapy and AS/WW showed no significant differences(HR=1.26,95%CI:0.92–1.74,P=0.149;and HR=1.26,95%CI:0.24–6.51,P=0.782,respectively).For patients with low-risk PCa,focal therapy was no match for AS/WW in decreasing OM,suggesting that AS/WW could bring more overall survival benefits. 展开更多
关键词 active surveillance cancer-specific mortality focal therapy low-risk prostate cancer overall mortality watchful waiting
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Parental acceptability of the watchful waiting approach in pediatric acute otitis media 被引量:2
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作者 Arnon Broides Olga Bereza +3 位作者 Noga Lavi-Givon Yariv Fruchtman Eli Gazala Eugene Leibovitz 《World Journal of Clinical Pediatrics》 2016年第2期198-205,共8页
AIM: To determine parental knowledge about acute otitis media(AOM) and its antibiotic therapy, antibiotic resistance and the willingness to comply with the watchful waiting(WW) approach in primary care settings in sou... AIM: To determine parental knowledge about acute otitis media(AOM) and its antibiotic therapy, antibiotic resistance and the willingness to comply with the watchful waiting(WW) approach in primary care settings in southern Israel.METHODS: The study was conducted in 3 primary care clinics and the pediatric emergency room of Soroka University Medical Center. Questionnaires(20 questions on education background, previous AOM experience, knowledge on antimicrobial resistance and attitude vs the WW approach) were filled by 600 parents(150 at each centers) of children < 6 years of age.RESULTS: Mothers represented 69% of parents; 2% had an education of < 10 school years, 46% had high-school education and 17% had an academic degree. 69% parents reported previous experience with AOM and 56% thought that antibiotics represent the only treatment for AOM. Knowledge on bacterial resistance to antibiotics was reported by 57% of the parents; 86% parents were willing to accept/probably accept the WW approach for their children. Logistic regression analysis revealed a significant association between parental education and knowledge about bacterial resistance to antibiotics and that previous experience with AOM was significantly associated with reluctance to accept the WW approach. More parents with knowledge on bacterial resistance were willing to accept the WW approach compared with parents without such knowledge. No correlation was found between the education level and willingness to accept the WW approach. CONCLUSION: A significant correlation was found between previous parental education and experience with AOM and the knowledge about antibiotic use, bacterial resistance and acceptance of the WW approach. 展开更多
关键词 Acute OTITIS media Children ANTIBIOTICS PARENTS watchful WAITING Bacteria Resistance
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The comparison of survival between active surveillance or watchful waiting and focal laser ablation in patients with low-risk prostate cancer
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作者 Jia-Kun Li Chi-Chen Zhang +10 位作者 Shi Qiu Kun Jin Bo-Yu Cai Qi-Ming Yuan Xing-Yu Xiong Lian-Sha Tang Di Jin Xiang-Hong Zhou Yi-Ge Bao Lu Yang Qiang Wei 《Asian Journal of Andrology》 SCIE CAS CSCD 2022年第5期494-499,共6页
Prostate cancer(PCa)is the second-most common cancer among men.Both active surveillance or watchful waiting(AS/WW)and focal laser ablation(FLA)can avoid the complications caused by radical treatment.How to make the ch... Prostate cancer(PCa)is the second-most common cancer among men.Both active surveillance or watchful waiting(AS/WW)and focal laser ablation(FLA)can avoid the complications caused by radical treatment.How to make the choice between these options in clinical practice needs further study.Therefore,this study aims to compare and analyze their effects based on overall survival(OS)and cancer-specific survival(CSS)to obtain better long-term benefits.We included patients with low-risk PCa from the Surveillance Epidemiology and End Results database of 2010–2016.Multivariate Cox proportional hazard analyses were conducted for OS and CSS in the two groups.To eliminate bias,this study applied a series of sensitivity analyses.Moreover,Kaplan–Meier curves were plotted to obtain survival status.A total of 18841 patients with low-risk PCa were included,with a median of 36-month follow-up.According to the multivariate Cox proportional hazard regression,the FLA group presented inferior survival benefits in OS than the AS/WW group(hazard ratio[HR]:2.13,95%confidence interval[CI]:1.37–3.33,P<0.05).After adjusting for confounders,the result persisted(HR:1.69,95%CI:1.02–2.81,P<0.05).According to the results of the sensitivity analysis,the inverse probability of the treatment weighing model indicated the same result in OS.In conclusion,AS/WW and FLA have the advantage of fewer side effects and the benefit of avoiding overtreatment compared with standard treatment.Our study suggested that AS/WW provides more survival benefits for patients with low-risk PCa.More relevant researches and data will be needed for further clarity. 展开更多
关键词 active surveillance cancer-specific survival focal laser ablation low-risk prostate cancer overall survival watchful waiting
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Survival in men older than 75 years with low- and intermediate-grade prostate cancer managed with watchful waiting with active surveillance
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作者 Tzuyung D.Kou Siran M.Koroukian +3 位作者 Pingfu Fu Derek Raghavan Gregory S.Cooper Li Li 《Family Medicine and Community Health》 2015年第3期25-36,共12页
Objective:Recent studies have reported the underuse of active surveillance or watchful wait-ing for low-risk prostate cancer in the United States.This study examined prostate cancer-specific and all-cause death in eld... Objective:Recent studies have reported the underuse of active surveillance or watchful wait-ing for low-risk prostate cancer in the United States.This study examined prostate cancer-specific and all-cause death in elderly patients older than 75 years with low-risk tumors managed with active treatment versus watchful waiting with active surveillance(WWAS).Methods:We performed survival analysis in a cohort of 18,599 men with low-risk tumors(early and localized tumors)who were 75 years or older at the time of prostate cancer diagnosis in the linked Surveillance,Epidemiology,and End Results(SEER)-Medicare database(from 1992 to 1998)and who were followed up through December 2003.WWAS was defined as having an-nual screening for prostate-specific antigen and/or digital rectal examination during the follow-up period.The risks of prostate cancer-specific and all-cause death were compared by Cox regression models.The propensity score matching technique was used to address potential selection bias.Results:In patients with well-differentiated(Gleason score 2-4)and localized disease,those managed with WWAS without delayed treatment had higher risk of all-cause death(hazard ratio 1.20,95%confidence interval 1.13-1.28)but a substantially lower risk of prostate cancer-specific death(hazard ratio 0.62,confidence interval 0.51-0.75)than patients undergoing active treatment.Patients managed with WWAS with delayed treatment had comparable mortality outcomes.Sensi-tivity analyses based on propensity score matching yielded similar results.Conclusion:In men older than 75 years with well-differentiated and localized prostate cancer,WWAS without delayed treatment had a lower risk of prostate cancer-specific death and compa-rable all-cause death as compared with active treatment.Those patients in whom treatment was delayed had comparable mortality outcomes.Our results support WWAS as an initial management option for older men with well-differentiated and localized prostate cancer. 展开更多
关键词 EPIDEMIOLOGY watchful waiting prostate cancer
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Is That True?
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作者 Evangelyn Stephen 《空中英语教室(初级版.大家说英语)》 2026年第1期45-47,56,共4页
People read many things online these days.It's an easy way to get a lot of information fast.They look at news,see posts and watch videos.But how much of the information is true?Some things online are fake.So it... People read many things online these days.It's an easy way to get a lot of information fast.They look at news,see posts and watch videos.But how much of the information is true?Some things online are fake.So it's important to check the facts before you believe or share anything.You can ask people or look at other sources first.Check newspapers or official websites.Always think carefully before you believe something online. 展开更多
关键词 online information fact checking fake news NEWS watch videosbut SOURCES social media official websites
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Asymptomatic gallstone disease:Re-evaluating the threshold for surgical options in the era of precision medicine
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作者 Prakash K Sasmal Pradeep K Singh +1 位作者 Ankit Sahoo Tanmay Dutta 《World Journal of Gastrointestinal Surgery》 2025年第11期67-83,共17页
Incidental asymptomatic gallstone disease(AGD)is prevalent,but its management remains contentious.Old-fashioned conservative care is under scrutiny today with precision medicine and artificial intelligence(AI)on the h... Incidental asymptomatic gallstone disease(AGD)is prevalent,but its management remains contentious.Old-fashioned conservative care is under scrutiny today with precision medicine and artificial intelligence(AI)on the horizon.Unlike previous overviews,this review primarily focuses on clinical outcomes,surgical decision-making,and the integration of genomics,predictive analytics,and precision tools into AGD management.We emphasise how AI-based models and precision diagnostics enable tailored recommendations,preventing unnecessary cholecystectomy in low-risk patients while requiring early elective surgery in high-risk subgroups(e.g.,single large stones,polyps,endemic cancer areas).We also compare cost-effectiveness,surgical safety,and quality of life(QoL)measures within this precision strategy.Our vision is to overcome the binary"operate or observe"model by leveraging technology-enabled forecasting and collaborative decision-making to deliver future-proof care for AGD.The terminology of asymptomatic gallstones was used more meticulously in the era of open cholecystectomy,when neither the diagnostic tools nor the concept of minimal access surgery were available.After careful consideration of the evidence on natural history,risk of surgery,QoL,and cost,we recommend that clinicians utilise shared decision-making and present information regarding cholecystectomy as an intervention option to all patients with asymptomatic gallstones. 展开更多
关键词 CHOLELITHIASIS LAPAROSCOPY watchful waiting Gallbladder cancer PANCREATITIS Obstructive jaundice Clinical decision support systems Artificial intelligence in surgery Bile duct injury Health equity
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我国能源类SCI期刊撤稿现状与对策
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作者 付凌霄 芮雪 +1 位作者 刘瑞芹 李晓晴 《科技传播》 2025年第11期40-44,共5页
以能源类SCI期刊为研究对象,系统分析2019—2023年期间的撤稿现状,重点探讨撤稿率与期刊影响因子、审稿周期及开放获取政策的相关性。研究结果显示:撤稿主要原因集中于数据问题(21.4%)、图像问题(20.6%)及抄袭(19.8%),且实验密集型领域... 以能源类SCI期刊为研究对象,系统分析2019—2023年期间的撤稿现状,重点探讨撤稿率与期刊影响因子、审稿周期及开放获取政策的相关性。研究结果显示:撤稿主要原因集中于数据问题(21.4%)、图像问题(20.6%)及抄袭(19.8%),且实验密集型领域(如润滑与摩擦学、纳米材料、电池技术)撤稿问题尤为突出;研究论文撤稿数量(121篇)远超综述论文(5篇),前者以数据/图像问题为主,后者主要是抄袭;撤稿时滞超过1年的期刊占比过半,开放获取论文撤稿率(23.8%)显著低于非开放获取论文(76.2%);撤稿率与期刊影响因子呈显著负相关(Spearman ρ=-0.374,p<0.05),而与审稿周期无显著关联。基于此,建议能源领域期刊从四个方面优化治理:强化实验数据透明性与可追溯性,推行开放获取以增强监督效能,构建“预防-发现-惩戒”全链条学术诚信机制,实施分类型审稿策略(如研究论文数据双盲审、综述论文AI查重)。 展开更多
关键词 能源类SCI期刊 撤稿 Retraction Watch数据库 学术诚信
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Whale & Dolphin Watching
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《空中英语教室(初级版.大家说英语)》 2025年第6期43-45,56,共4页
Find It What do boat captai ns try to do?W hale and dolphin watching is a popular thing to do off the coast of Hualien.*It is an amazing adventure!Imagine this:You are on a boat.Then a big whale jumps out of the water.
关键词 BOAT CAPTAIN WHALE COAST dolphin watching DOLPHIN Hualien WATCHING
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My Mother's Tears
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作者 贺伟 《中学生英语》 2025年第15期6-6,共1页
Yesterday I lost my favorite watch.It was a gift from my grandfather.I was so sad and worried.I looked for it here and there,but I just couldn't find.
关键词 worried TEARS GIFT SAD search favorite watch GRANDFATHER
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My Mother's Busy Day
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作者 沈一凡 张超 《中学生英语》 2025年第17期6-6,共1页
My mother is a worker in a factory and she is very busy every day.After got1up at six o'clock,she brushes her teeth and washes her face.Then she does breakfast2for us.She often has breakfast at half past six and s... My mother is a worker in a factory and she is very busy every day.After got1up at six o'clock,she brushes her teeth and washes her face.Then she does breakfast2for us.She often has breakfast at half past six and she goes to work at seven.She works for eight hours every day.She often gets home at six thirty in the evening.Then she cooks dinner for us.After dinner,she watches TV or reads books for a while.Sometimes she helps me with my homework.She usually goes to bed about3twenty to eleven. 展开更多
关键词 MOTHER reads books HOMEWORK DINNER busy schedule BEDTIME factory worker watches tv
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Clinical Research on Effects of Acupoint Injection Combined with Task-Oriented Training on Post-Stroke Hemiplegic Gait Based on the Gait Watch Analysis System
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作者 Chao ZUO Haiju LI +3 位作者 Yiqin LI Guangbao NI Tingting XIAO Xueping ZHANG 《Medicinal Plant》 2025年第4期43-44,49,共3页
[Objectives]To investigate the clinical efficacy of acupoint injection of nerve growth factors combined with task-oriented training for patients with post-stroke hemiplegic gait,and quantitatively evaluate the outcome... [Objectives]To investigate the clinical efficacy of acupoint injection of nerve growth factors combined with task-oriented training for patients with post-stroke hemiplegic gait,and quantitatively evaluate the outcomes using the Gait Watch analysis system.[Methods]A total of 90 patients with post-stroke hemiplegia,who were hospitalized at the Rehabilitation Center of Taihe Hospital between January 2023 and December 2023,were selected for this study.The participants were randomly assigned to three groups:the task-oriented rehabilitation training group(control group I,n=30),the ordinary acupuncture combined with task-oriented training group(control group II,n=30),and the acupoint injection combined with task-oriented training group(observation group,n=30).Each group underwent treatment for 4 weeks.The Gait Watch analysis system was employed to assess the spatiotemporal gait parameters of the patients prior to treatment,as well as 2 weeks post treatment and 4 weeks post treatment.The efficacy of the treatment was subsequently analyzed.[Results]After 4 weeks of treatment,the spatiotemporal gait parameters,specifically step length,step speed,step frequency,percentage of the standing phase,and percentage of the swinging phase,exhibited significant improvement in the observation group compared to those before treatment(P<0.05).Furthermore,the degree of improvement in the observation group was superior to that observed in both control group I and control group II,with the differences reaching statistical significance(P<0.05).[Conclusions]Acupoint injection combined with task-oriented training has been shown to significantly enhance gait function in patients with post-stroke hemiplegia.The Gait Watch analysis system offers an accurate and objective quantitative assessment,making it a valuable tool for clinical application and promotion. 展开更多
关键词 Stroke HEMIPLEGIA Acupoint injection Task-oriented training Gait analysis Gait Watch
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THE BOY WHO CRIED WOLF
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作者 Ruth Devlin 《空中英语教室(初级版.大家说英语)》 2025年第2期10-14,50,51,56,共8页
Find It What did the shepherd boy do for fun?nce there was a shepherd boy,His job was watching the village's flock of sheep.He watched them in a field near some trees.He was not far from the village,but he was all... Find It What did the shepherd boy do for fun?nce there was a shepherd boy,His job was watching the village's flock of sheep.He watched them in a field near some trees.He was not far from the village,but he was all by himself. 展开更多
关键词 SHE BOY WATCH
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ARE THREE-MINUTE COMMENTARIES DESTROYING MOVIES? How short video summaries alter cinematic experience
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《China Report ASEAN》 2025年第1期64-64,共1页
“As a director,I hope that the audience will see a movie in cinemas instead of watching threeminute commentaries,about which I’m really speechless,”internationally renowned film director Zhang Yimou said in a recen... “As a director,I hope that the audience will see a movie in cinemas instead of watching threeminute commentaries,about which I’m really speechless,”internationally renowned film director Zhang Yimou said in a recent interview.Zhang said he believes the ritual and immersive feeling brought about by watching movies in the cinema cannot be replaced by watching movie commentaries online.He called on audiences to go to the cinema and experience in person the audio-visual feast delivered by the big screen.Zhang’s views on the so-called“threeminute movies”have become a trending topic on social media.The new genre,in which content creators on short-video platforms create summarized versions of films,also includes the creator’s own observations.The rise of these platforms has lowered barriers to entry for aspiring movie content creators,giving rise to not only high volume and great diversity but also large discrepancies in quality.Moreover,this content sometimes infringes the copyrights of the movies it features,while also misinterpreting their plots and themes. 展开更多
关键词 INTERPRETING MOVIE WATCH
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Watch-and-wait strategy for complete responders after conversion therapy for initially unresectable hepatocellular carcinoma
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作者 Chenwei Wang Binkui Li Yunfei Yuan 《Oncology and Translational Medicine》 2025年第5期201-204,共4页
1.Introduction Hepatocellular carcinoma(HCC)is the most common primary malignancy of the liver.HCC is the sixth most frequently diagnosed cancer and the third leading cause of cancer-relatedmortality worldwide.[1]Part... 1.Introduction Hepatocellular carcinoma(HCC)is the most common primary malignancy of the liver.HCC is the sixth most frequently diagnosed cancer and the third leading cause of cancer-relatedmortality worldwide.[1]Partial hepatectomy is recommended for patients with early stage HCC.[2]A large proportion of patients with HCC inChina are diagnosed in the intermediate to advanced HCC stages,rendering them ineligible for hepatectomy due to aspects such as liver dysfunction,insufficient residual liver volume,or surgical technique. 展开更多
关键词 liver dysfunctioninsufficient complete responders watch wait conversion therapy hepatocellular carcinoma hcc unresectable hepatocellular carcinoma
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Chinese Documentaries
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《China Today》 2025年第10期71-71,共1页
The Last Watch Chief Director:Ma Wanting Length:Eight Episodes Producers:bilibili and Shanxi Cultural Relics Bureau Broadcasting Platform:bilibili Cultural relics are symbols of the wisdom of Chinese ancestors and tra... The Last Watch Chief Director:Ma Wanting Length:Eight Episodes Producers:bilibili and Shanxi Cultural Relics Bureau Broadcasting Platform:bilibili Cultural relics are symbols of the wisdom of Chinese ancestors and traditional Chinese culture.Shanxi,a mountainous province in north China,is now a popular travel destination with a rich cultural heritage. 展开更多
关键词 eight episodes Chinese documentaries WISDOM Last Watch bilibili cultural relics Ma Wanting Shanxi cultural relics bureau
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Ecological Awakening Dehong Prefecture is pushing the boundaries of ecological civilization by developing a bird-watching economy
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作者 Zheng Bin Liu Yang 《China Report ASEAN》 2025年第6期76-77,共2页
With the first rays of dawn peeking through the rainforest at Shiti Village,Dehong Dai and Jingpo Autonomous Prefecture,Yunnan Province,Xu Xiaolong,a bird-watching guide from the Jingpo ethnic group,led a German bird-... With the first rays of dawn peeking through the rainforest at Shiti Village,Dehong Dai and Jingpo Autonomous Prefecture,Yunnan Province,Xu Xiaolong,a bird-watching guide from the Jingpo ethnic group,led a German bird-watching group into the jungle.His great-grandfather made a living by hunting“weird-looking birds”in the mountains.Today,the birds(Great Hornbill)are attracting tourist dollars from other parts of the world without dodging bullets.In Shiti Village,bird-watchers can enjoy the chirping of Great Hornbills and feel the rumbling in the air as the birds fly past.The village on the Chinese border with Myanmar was formerly poverty-stricken,with an average annual income of barely 2,000 yuan(US$305)per household 10 years ago.Today,the average annual income has grown to 150,000 yuan(US$23,075).It is a shining example of the successful practice of the notion that“lucid waters and lush mountains are invaluable assets.” 展开更多
关键词 bird watching economy sustainable development great hornbill chirping great hor Dehong prefecture ecological awakening ecological civilization Yunnan province
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Watch and wait in locally advanced rectal cancer:Evolution, current evidence, and future directions
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作者 Andrés García-Fernández Pilar del Pozo-Elso +2 位作者 Arantxa Villadóniga-Sánchez Raquel Martínez Miguel Suárez 《World Journal of Gastrointestinal Surgery》 2025年第9期17-33,共17页
The treatment of locally advanced rectal cancer(LARC)has evolved significantly over the past century,driven by a deeper understanding of tumor biology,technological advancements,and multidisciplinary approaches.This a... The treatment of locally advanced rectal cancer(LARC)has evolved significantly over the past century,driven by a deeper understanding of tumor biology,technological advancements,and multidisciplinary approaches.This article reviews the historical progression of LARC management,emphasizing the latest breakthroughs that are reshaping treatment paradigms.Key developments include the watch and wait strategy for patients achieving a complete clinical response after neoadjuvant therapy,the emergence of total neoadjuvant therapy as a standard approach,and the adoption of minimally invasive surgical techniques,such as transanal endoscopic microsurgery.Watch and wait may reduce treatment-related morbidity and help preserve anorectal function,but it requires rigorous patient selection and close long-term surveillance to ensure oncologic safety.Additionally,the role of targeted therapies and immunotherapy is gaining prominence,offering new opportunities for personalized treatment.These innovations aim to improve oncological outcomes while minimizing morbidity and preserving organ function,ultimately enhancing patients’quality of life.Despite these advancements,challenges remain in optimizing patient selection,refining treatment strategies,and ensuring long-term safety and efficacy.A multidisciplinary approach involving surgeons,oncologists,and radiation specialists is crucial to tailoring therapies to individual patient profiles.As research continues,integrating novel therapeutic strategies will be key to further improving survival rates and reducing treatment-related morbidity in LARC patients. 展开更多
关键词 Locally advanced rectal cancer Watch and wait Total neoadjuvant therapy Organ-preserving therapy Target tailored therapy
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基于Global Forest Watch观察2000-2013年间中国森林变化 被引量:23
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作者 王昊 吕植 +1 位作者 顾垒 闻丞 《生物多样性》 CAS CSCD 北大核心 2015年第5期575-582,共8页
了解森林的变化,是评价生物多样性变化趋势和制订有效保护行动的基础,也是公共政策及广大公众普遍关心的议题,然而国内一直都没有可供空间分析的森林分布及变化的公开数据。Hansen等于2013年在Global Forest Watch网站上发布了基于Land... 了解森林的变化,是评价生物多样性变化趋势和制订有效保护行动的基础,也是公共政策及广大公众普遍关心的议题,然而国内一直都没有可供空间分析的森林分布及变化的公开数据。Hansen等于2013年在Global Forest Watch网站上发布了基于Landsat数据的30 m分辨率的全球森林变化数据集,第一次提供给研究者一套高分辨率的公开数据。我们解读了2000–2013年的数据,并与已有的国家森林清查、China Cover、Globe Land30等数据集进行比较。结果表明,Global Forest Watch数据质量可靠,其与Globe Land30数据集的森林分布有较高的空间重合度,后者森林类别的生产者精度为87%,用户精度为89%。在大于20%的树木覆盖度下,估算出2000年森林面积为1,780,472 km2,与同期国家森林清查数据1,749,092 km2相近,解读结果表明2000–2010年间森林减少面积在37,551–42,031 km2之间,而同期其他几套数据显示森林面积增量为2,370–433,810 km2。森林面积年减少量最大值出现在2008年,以该年为拐点,森林每年减少面积的变化趋势在此之前为显著增加,在此之后为显著降低,林地变化最活跃的区域在广西、广东、福建、江西和云南等南方省份。到2013年底,占保护区总面积约60%以上的407个国家级保护区仅覆盖了森林面积的5.03%,对森林保护的面积覆盖有限,保护区对其内部的森林保护有成效,区内森林面积净减1.39%,低于全国平均水平(3.46%),相当于少毁林1,856 km2,但仍有1,200 km2的净减。 展开更多
关键词 GLOBAL FOREST WATCH 数据质量 森林变化 保护区 中国
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多臂井径测井检测套损及其评价方法 被引量:35
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作者 陈福利 柴细元 +3 位作者 金勇 李冬梅 冯新茶 马飞 《测井技术》 CAS CSCD 2005年第1期79-81,共3页
套管损坏主要分为套管变形、破损和密封性破坏3类。多臂井径测井仪主要用于测量套管内径变化,提供套管变径、壁厚、套管外径变化、椭圆变形及等效破坏载荷等评价资料。根据多臂井径测井套损检测评价标准,已在WATCH平台开发出相对应的评... 套管损坏主要分为套管变形、破损和密封性破坏3类。多臂井径测井仪主要用于测量套管内径变化,提供套管变径、壁厚、套管外径变化、椭圆变形及等效破坏载荷等评价资料。根据多臂井径测井套损检测评价标准,已在WATCH平台开发出相对应的评价软件,可进行2~80臂井径测井套损检测评价,给出多种直观图,满足大多数生产井套管维修和工程地质应用的需要。 展开更多
关键词 多臂井径测井仪 套损检测 WATCH平台 评价方法
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放射性同位素示踪注水剖面污染校正研究 被引量:6
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作者 陈福利 柴细元 +2 位作者 李冬梅 金勇 马飞 《测井技术》 CAS CSCD 2003年第6期528-533,共6页
同位素示踪注水剖面测井的理论基础是同位素示踪测量技术。测井实践表明,同位素示踪污染广泛存在。同位素污染校正是改善和提高注水剖面测井解释成果的重要技术,研究各种井况下污染类型识别、污染校正系数等是保证污染校正准确的基础。... 同位素示踪注水剖面测井的理论基础是同位素示踪测量技术。测井实践表明,同位素示踪污染广泛存在。同位素污染校正是改善和提高注水剖面测井解释成果的重要技术,研究各种井况下污染类型识别、污染校正系数等是保证污染校正准确的基础。研究表明,目前各油田普遍使用的常规经验校正系数,仅对特殊的井况条件适用,必须根据现场实际研究相应的校正方法才能更好满足注水剖面监测需要。WATCH平台提供了完善的注水剖面污染校正技术。 展开更多
关键词 同位素示踪测井 同位素示踪污染 污染类型识别 污染校正系数 WATCH平台
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