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   2376242篇
  免费   194671篇
  国内免费   4216篇
耳鼻咽喉   34275篇
儿科学   72766篇
妇产科学   62946篇
基础医学   335028篇
口腔科学   67686篇
临床医学   215618篇
内科学   468824篇
皮肤病学   47955篇
神经病学   200867篇
特种医学   95968篇
外国民族医学   886篇
外科学   360485篇
综合类   56218篇
现状与发展   1篇
一般理论   977篇
预防医学   190790篇
眼科学   55482篇
药学   177578篇
  4篇
中国医学   4378篇
肿瘤学   126397篇
  2018年   24243篇
  2016年   20605篇
  2015年   23332篇
  2014年   33582篇
  2013年   50894篇
  2012年   68838篇
  2011年   72393篇
  2010年   42522篇
  2009年   40901篇
  2008年   68839篇
  2007年   73185篇
  2006年   74046篇
  2005年   72082篇
  2004年   69381篇
  2003年   67045篇
  2002年   66289篇
  2001年   112460篇
  2000年   116537篇
  1999年   98342篇
  1998年   27868篇
  1997年   25527篇
  1996年   25453篇
  1995年   24612篇
  1994年   23162篇
  1993年   21556篇
  1992年   79394篇
  1991年   76395篇
  1990年   73576篇
  1989年   70844篇
  1988年   65848篇
  1987年   64807篇
  1986年   61334篇
  1985年   58401篇
  1984年   44223篇
  1983年   37658篇
  1982年   22887篇
  1981年   20332篇
  1980年   19037篇
  1979年   41301篇
  1978年   28985篇
  1977年   24346篇
  1976年   22832篇
  1975年   23965篇
  1974年   29638篇
  1973年   28044篇
  1972年   26231篇
  1971年   24152篇
  1970年   22755篇
  1969年   21092篇
  1968年   19142篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
Clinical Oral Investigations - The aims of this study are to assess different saliva substitutes for their efficacy to lubricate the oral cavity, and to relate this oral lubrication to the ability...  相似文献   
73.
Obtaining accurate assessment data from adolescents in treatment aids clinical decision making and facilitates more accurate outcome evaluations. However, findings could be biased due to underreported substance use and mental health symptoms. This article compares self-reports of youth in non-White matched client–assessor dyads and those in nonmatched dyads. There were no differences on self-reported substance use, but matched youth reported significantly fewer attention deficit/hyperactivity disorder symptoms versus the comparison group. One possible reason for these findings is the effect of in-group stereotype threat. Future studies should examine the potential effect that in-group stereotyping and perceived racism have on the therapeutic relationship.  相似文献   
74.
75.
76.
This study explored the relationship between active mediation, exposure to Daniel Tiger’s Neighborhood, and key indicators of preschoolers’ social and emotional development. One hundred and twenty-seven children aged 2–6 either watched or did not watch 10 episodes of Daniel Tiger’s Neighborhood over a two-week period. Results revealed that preschoolers who watched the program exhibited higher levels of empathy, self-efficacy, and emotion recognition when their regular TV-watching experiences are frequently accompanied by active mediation. This was especially true for younger preschoolers and preschoolers from low-income families. Implications for policy-makers, parents, producers of prosocial programming, and educators are discussed.  相似文献   
77.
78.
On 8 April 2014, a US jury ordered Takeda and Eli Lilly to pay $9 bn in punitive damages after finding that they had concealed the cancer risks associated with pioglitazone. By contrast, on 28 August 2014, the long‐awaited outcome of the 10‐year Kaiser Permanente Northern California study was announced. That study was specifically designed to investigate whether patients exposed to pioglitazone were at an increased risk of bladder cancer and found no association; thus, at last, the controversial issue has been resolved. A review, in retrospect, of the story of the proposed link between pioglitazone and bladder cancer reveals flaws at every stage. In 2012, a BMJ editorial, in keeping with some other contemporary reports, stated ‘it can confidently be assumed that pioglitazone increases the risk of bladder cancer’. Examination of the information which led to such a statement shows that: 1) the pre‐clinical findings of bladder cancer in male rats is not indicative of human risk; 2) there is no association between bladder cancer and pioglitazone in randomized controlled trials, once cases that could not plausibly be related to treatment are removed; and 3) the observational studies that have suggested a link have over‐extrapolated from the data: pioglitazone‐treated patients had more risk factors for bladder cancer than those not treated with pioglitazone. Meanwhile careful study of randomized controlled trials shows evidence of cardiovascular benefit from pioglitazone in Type 2 diabetes, a condition which results, more than anything, in premature cardiovascular death and morbidity.  相似文献   
79.
80.
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