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   143755篇
  免费   34054篇
  国内免费   1162篇
耳鼻咽喉   2745篇
儿科学   4043篇
妇产科学   3307篇
基础医学   8762篇
口腔科学   6281篇
临床医学   31983篇
内科学   33103篇
皮肤病学   3957篇
神经病学   15783篇
特种医学   5459篇
外国民族医学   1篇
外科学   23719篇
综合类   1318篇
现状与发展   40篇
一般理论   37篇
预防医学   19023篇
眼科学   2982篇
药学   5080篇
中国医学   95篇
肿瘤学   11253篇
  2024年   755篇
  2023年   5130篇
  2022年   1375篇
  2021年   3277篇
  2020年   5622篇
  2019年   2624篇
  2018年   7540篇
  2017年   7779篇
  2016年   8417篇
  2015年   8623篇
  2014年   11285篇
  2013年   13409篇
  2012年   5752篇
  2011年   5527篇
  2010年   7957篇
  2009年   10137篇
  2008年   5471篇
  2007年   4534篇
  2006年   5710篇
  2005年   4144篇
  2004年   3396篇
  2003年   3021篇
  2002年   2950篇
  2001年   3377篇
  2000年   2655篇
  1999年   3161篇
  1998年   2664篇
  1997年   2387篇
  1996年   2422篇
  1995年   2182篇
  1994年   1521篇
  1993年   1387篇
  1992年   1959篇
  1991年   1753篇
  1990年   1584篇
  1989年   1558篇
  1988年   1483篇
  1987年   1349篇
  1986年   1338篇
  1985年   1202篇
  1984年   1029篇
  1983年   945篇
  1982年   659篇
  1981年   559篇
  1980年   475篇
  1979年   657篇
  1978年   617篇
  1977年   501篇
  1976年   476篇
  1974年   524篇
排序方式: 共有10000条查询结果,搜索用时 19 毫秒
61.
62.
63.
Clinical outcomes data can be used to facilitate patient management decisions, assess clinician and organizational performance, and to provide evidence for the effectiveness of surgery and rehabilitation. The validity of the inferences made from outcomes data are dependent on the validity of the outcomes measures themselves and the circumstances under which the data were collected, analyzed, and interpreted. Clinical outcomes may include measures of impairment of body structure and function, activity limitation, and participation restriction. However, because the relationship between impairment and the resulting activity limitation and participation restriction is not direct, and because activity limitations and participation restrictions are of the utmost concern to the athlete, the primary clinical outcome should be measures of activity limitation and participation restriction. Activity limitation and participation restriction may be measured either through direct observation of performance or by general or specific measures of health related quality of life. Clinical outcomes data must be collected systematically to ensure valid inferences from the data.  相似文献   
64.
65.
66.
67.
68.
69.
There is limited information regarding oral health status and other predictors of oral health‐related quality of life. An association between oral health status and perceived oral health‐related quality of life (OHQOL) might help clinicians motivate patients to prevent oral diseases and improve the outcome of some dental public health programs. This study evaluated the relationship between older persons' OHQOL and their functional dentition, caries, periodontal status, chronic diseases, and some demographic characteristics. A group of 733 low‐income elders (mean age 72.7 ISD=4.71, 55.6% women, 55.1% members of ethnic minority groups in the U.S. and Canada) enrolled in the TEETH clinical trial were interviewed and examined as part of their fifth annual visit for the trial. OHQOL was measured by the Geriatric Oral Health Assessment Index (GOHAI); oral health and occlusal status by clinical exams and the Eichner Index; and demographics via interviews. Elders who completed the four‐year assessment had an average of 21.5 teeth (SD=6.9). with 8.5 occluding pairs (SD=4.6), and 32% with occlusal contacts in all four occluding zones. Stepwise multiple regressions were conducted to predict total GOHAI and its subscores (Physical, Social, and Worry). Functional dentition was a less significant predictor than ethnicity and being foreign‐bom. These variables, together with gender, years since immigrating, number of carious roots, and periodontal status, could predict 32% of the variance in total GOHAI, 24% in Physical, 27% in Social, and 21 % in the Worry subscales. These findings suggest that functional dentition and caries influence older adults' OHQOL, but that ethnicity and immigrant status play a larger role.  相似文献   
70.
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