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   2650709篇
  免费   191784篇
  国内免费   4984篇
耳鼻咽喉   34929篇
儿科学   87228篇
妇产科学   72851篇
基础医学   382218篇
口腔科学   76545篇
临床医学   242279篇
内科学   514312篇
皮肤病学   59333篇
神经病学   208350篇
特种医学   98735篇
外国民族医学   496篇
外科学   389983篇
综合类   59834篇
现状与发展   6篇
一般理论   1041篇
预防医学   208080篇
眼科学   62287篇
药学   194334篇
  12篇
中国医学   5873篇
肿瘤学   148751篇
  2019年   20897篇
  2018年   29553篇
  2017年   22413篇
  2016年   24655篇
  2015年   28236篇
  2014年   39233篇
  2013年   58458篇
  2012年   80551篇
  2011年   85267篇
  2010年   50107篇
  2009年   47304篇
  2008年   79777篇
  2007年   84909篇
  2006年   85180篇
  2005年   82015篇
  2004年   79103篇
  2003年   75479篇
  2002年   73030篇
  2001年   128290篇
  2000年   131230篇
  1999年   109494篇
  1998年   29800篇
  1997年   26408篇
  1996年   26701篇
  1995年   25432篇
  1994年   23498篇
  1993年   21839篇
  1992年   84304篇
  1991年   82069篇
  1990年   79163篇
  1989年   76536篇
  1988年   70162篇
  1987年   68704篇
  1986年   65046篇
  1985年   61509篇
  1984年   45969篇
  1983年   39597篇
  1982年   22832篇
  1979年   42062篇
  1978年   29830篇
  1977年   25244篇
  1976年   23512篇
  1975年   25005篇
  1974年   30406篇
  1973年   29655篇
  1972年   27682篇
  1971年   25759篇
  1970年   24182篇
  1969年   22722篇
  1968年   21168篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
ObjectivesTo fill an empirical gap in the literature by examining changes in quality of care measures occurring when multispecialty clinic systems were acquired by hospital-owned, vertically integrated health care delivery systems in the Twin Cities area.ConclusionsMoving a clinic system into a vertically integrated delivery system resulted in limited increases in quality of care indicators. Caution is warranted when the acquisition causes disruption in referral patterns.  相似文献   
82.
BackgroundThe aim of this paper is to assess the current state of quality and outcomes measures being reported for hepatic resections in the recent literature.MethodsMedline and PubMed databases were searched for English language articles published between 1 January 2002 and 30 April 2013. Two examiners reviewed each article and relevant citations for appropriateness of inclusion, which excluded papers of liver donor hepatic resections, repeat hepatectomies or meta-analyses. Data were extracted and summarized by two examiners for analysis.ResultsFifty-five studies were identified with suitable reporting to assess peri-operative mortality in hepatic resections. In only 35% (19/55) of the studies was the follow-up time explicitly stated, and in 47% (26/55) of studies peri-operative mortality was limited to in-hospital or 30 days. The time period in which complications were captured was not explicitly stated in 19 out of 28 studies. The remaining studies only captured complications within 30 days of the index operation (8/28). There was a paucity of quality literature addressing truly patient-centred outcomes.ConclusionQuality outcomes after a hepatic resection are inconsistently reported in the literature. Quality outcome studies for a hepatectomy should report mortality and morbidity at a minimum of 90 days after surgery.  相似文献   
83.
There are an estimated 56 million orphans and vulnerable children across sub-Saharan Africa. Communities typically care for orphan children through informal caring arrangements – either within or outside of kinship networks. Within Kenya, an estimated 250,000 children live on the streets. There is less research related to fostering attitudes of this special population than orphans and vulnerable children generally. Important research over the past decade has illuminated multiple ways in which children are made more vulnerable because of HIV, including parental death and street-migration from HIV-affected households. As HIV transitions from a terminal illness to a chronic, manageable one, research is also required to establish how parents living with HIV can be an asset to children. In this study, we assess whether mothers living with HIV were very willing to foster biologically-related children, and street-involved children, how these fostering attitudes differed from mothers not living with HIV, and whether differences in fostering attitudes by reported HIV status were mediated by social support, family functioning and general self-rated health. Approximately 40% of mothers living with HIV were very willing to provide long-term foster care to biologically-related or street-involved children. This was less than the percentage of mothers not living with HIV, who were very willing to foster biologically-related children (61%) or street-involved children (58%). Significant portions of these differences were explained by social support, family functioning and general self-rated health. Multi-sectoral approaches are suggested by these findings in order to improve the child-fostering capacity of mothers living with HIV. Improving social support, family functioning and general self-rated health among HIV-infected mothers may not only provide protective benefits for the mothers and their children, but also expand the community’s capacity to care for orphan and vulnerable children.  相似文献   
84.
85.
86.
87.
88.
89.
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