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   106804篇
  免费   29831篇
  国内免费   1088篇
耳鼻咽喉   2474篇
儿科学   2898篇
妇产科学   2653篇
基础医学   3954篇
口腔科学   5214篇
临床医学   27151篇
内科学   25942篇
皮肤病学   3595篇
神经病学   13077篇
特种医学   3718篇
外科学   18473篇
综合类   190篇
现状与发展   40篇
一般理论   38篇
预防医学   14503篇
眼科学   2290篇
药学   1836篇
中国医学   29篇
肿瘤学   9648篇
  2024年   749篇
  2023年   5117篇
  2022年   1367篇
  2021年   3137篇
  2020年   5499篇
  2019年   2372篇
  2018年   7222篇
  2017年   7550篇
  2016年   8197篇
  2015年   8264篇
  2014年   10805篇
  2013年   12576篇
  2012年   4457篇
  2011年   4260篇
  2010年   7191篇
  2009年   9376篇
  2008年   4004篇
  2007年   2972篇
  2006年   4143篇
  2005年   2645篇
  2004年   1938篇
  2003年   1560篇
  2002年   1461篇
  2001年   1857篇
  2000年   1171篇
  1999年   1719篇
  1998年   2137篇
  1997年   1945篇
  1996年   1993篇
  1995年   1722篇
  1994年   1132篇
  1993年   945篇
  1992年   774篇
  1991年   665篇
  1990年   528篇
  1989年   544篇
  1988年   526篇
  1987年   386篇
  1986年   365篇
  1985年   318篇
  1984年   274篇
  1983年   321篇
  1982年   249篇
  1981年   227篇
  1980年   147篇
  1978年   138篇
  1977年   137篇
  1976年   100篇
  1974年   86篇
  1972年   78篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
52.
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   
53.
54.
55.
56.
57.
58.
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   
59.
60.
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