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   2567876篇
  免费   203762篇
  国内免费   4645篇
耳鼻咽喉   36676篇
儿科学   78395篇
妇产科学   67153篇
基础医学   362733篇
口腔科学   73226篇
临床医学   231791篇
内科学   507988篇
皮肤病学   52931篇
神经病学   218381篇
特种医学   101145篇
外国民族医学   950篇
外科学   384809篇
综合类   57026篇
现状与发展   1篇
一般理论   1031篇
预防医学   209103篇
眼科学   59193篇
药学   191322篇
  4篇
中国医学   4999篇
肿瘤学   137426篇
  2019年   20831篇
  2018年   30742篇
  2017年   23193篇
  2016年   25055篇
  2015年   28297篇
  2014年   38926篇
  2013年   59089篇
  2012年   83111篇
  2011年   86999篇
  2010年   49735篇
  2009年   46406篇
  2008年   80920篇
  2007年   86110篇
  2006年   85952篇
  2005年   83719篇
  2004年   80123篇
  2003年   76955篇
  2002年   75382篇
  2001年   115547篇
  2000年   119635篇
  1999年   101115篇
  1998年   28538篇
  1997年   26119篇
  1996年   25965篇
  1995年   25085篇
  1994年   23581篇
  1993年   21934篇
  1992年   81033篇
  1991年   77924篇
  1990年   75066篇
  1989年   72193篇
  1988年   67182篇
  1987年   66039篇
  1986年   62539篇
  1985年   59499篇
  1984年   45110篇
  1983年   38405篇
  1982年   23372篇
  1981年   20721篇
  1979年   42095篇
  1978年   29521篇
  1977年   24873篇
  1976年   23253篇
  1975年   24491篇
  1974年   30291篇
  1973年   28708篇
  1972年   26860篇
  1971年   24721篇
  1970年   23296篇
  1969年   21656篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.
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   
85.
86.
87.
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   
88.
89.
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   
90.
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