首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2999914篇
  免费   217821篇
  国内免费   5113篇
耳鼻咽喉   41216篇
儿科学   98996篇
妇产科学   81685篇
基础医学   439336篇
口腔科学   83796篇
临床医学   272111篇
内科学   577202篇
皮肤病学   66686篇
神经病学   237497篇
特种医学   113114篇
外国民族医学   768篇
外科学   449649篇
综合类   64902篇
现状与发展   12篇
一般理论   1162篇
预防医学   236426篇
眼科学   70080篇
药学   221736篇
  13篇
中国医学   5886篇
肿瘤学   160575篇
  2019年   24076篇
  2018年   33403篇
  2017年   25330篇
  2016年   28503篇
  2015年   32071篇
  2014年   45178篇
  2013年   68274篇
  2012年   93031篇
  2011年   99030篇
  2010年   59059篇
  2009年   55677篇
  2008年   92936篇
  2007年   98917篇
  2006年   99876篇
  2005年   96809篇
  2004年   93053篇
  2003年   89553篇
  2002年   86707篇
  2001年   135715篇
  2000年   139292篇
  1999年   117231篇
  1998年   34123篇
  1997年   30142篇
  1996年   30364篇
  1995年   28872篇
  1994年   26646篇
  1993年   25103篇
  1992年   91665篇
  1991年   89605篇
  1990年   87621篇
  1989年   84403篇
  1988年   77468篇
  1987年   76474篇
  1986年   71611篇
  1985年   68866篇
  1984年   51457篇
  1983年   43702篇
  1982年   26147篇
  1979年   47464篇
  1978年   34054篇
  1977年   28447篇
  1976年   27249篇
  1975年   29053篇
  1974年   35049篇
  1973年   33392篇
  1972年   31194篇
  1971年   29522篇
  1970年   27203篇
  1969年   25847篇
  1968年   23772篇
排序方式: 共有10000条查询结果,搜索用时 13 毫秒
11.
12.
13.
BackgroundTotal hip and knee arthroplasties are increasingly performed operations, and routine follow-up places huge demands on orthopedic services. This study investigates the effectiveness, patients’ satisfaction, and cost reduction of Virtual Joint Replacement Clinic (VJRC) follow-up of total hip arthroplasty and total knee arthroplasty patients in a university hospital. VJRC is especially valuable when in-person appointments are not advised or feasible such as during the COVID-19 pandemic.MethodsA total of 1749 patients who were invited for VJRC follow-up for knee or hip arthroplasty from January 2017 to December 2018 were included in this retrospective study. Patients were referred to VJRC after their 6-week postoperative review. Routine VJRC postoperative review was undertaken at 1 and 7 years and then 3-yearly thereafter. We evaluated the VJRC patient response rate, acceptability, and outcome. Patient satisfaction was measured in a subgroup of patients using a satisfaction survey. VJRC costs were calculated compared to face-to-face follow-up.ResultsThe VJRC had a 92.05% overall response rate. Only 7.22% required further in-person appointments with only 3% being reviewed by an orthopedic consultant. VJRC resulted in an estimated saving of £42,644 per year at our institution. The patients’ satisfaction survey showed that 89.29% of the patients were either satisfied or very satisfied with VJRC follow-up.ConclusionVJRC follow-up for hip and knee arthroplasty patients is an effective alternative to in-person clinic assessment which is accepted by patients, has high patient satisfaction, and can reduce the cost to both health services and patients.  相似文献   
14.
15.
16.
17.
18.
Cognitive Therapy and Research - Despite interest in psychological inflexibility as a marker of suicide risk, no measure of psychological inflexibility specific to SI exists. The present study...  相似文献   
19.
20.
Gestational trophoblastic neoplasia (GTN) patients are treated according to the eight-variable International Federation of Gynaecology and Obstetrics (FIGO) scoring system, that aims to predict first-line single-agent chemotherapy resistance. FIGO is imperfect with one-third of low-risk patients developing disease resistance to first-line single-agent chemotherapy. We aimed to generate simplified models that improve upon FIGO. Logistic regression (LR) and multilayer perceptron (MLP) modelling (n = 4191) generated six models (M1-6). M1, all eight FIGO variables (scored data); M2, all eight FIGO variables (scored and raw data); M3, nonimaging variables (scored data); M4, nonimaging variables (scored and raw data); M5, imaging variables (scored data); and M6, pretreatment hCG (raw data) + imaging variables (scored data). Performance was compared to FIGO using true and false positive rates, positive and negative predictive values, diagnostic odds ratio, receiver operating characteristic (ROC) curves, Bland-Altman calibration plots, decision curve analysis and contingency tables. M1-6 were calibrated and outperformed FIGO on true positive rate and positive predictive value. Using LR and MLP, M1, M2 and M4 generated small improvements to the ROC curve and decision curve analysis. M3, M5 and M6 matched FIGO or performed less well. Compared to FIGO, most (excluding LR M4 and MLP M5) had significant discordance in patient classification (McNemar's test P < .05); 55-112 undertreated, 46-206 overtreated. Statistical modelling yielded only small gains over FIGO performance, arising through recategorisation of treatment-resistant patients, with a significant proportion of under/overtreatment as the available data have been used a priori to allocate primary chemotherapy. Streamlining FIGO should now be the focus.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号