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   2339661篇
  免费   182862篇
  国内免费   7292篇
耳鼻咽喉   30239篇
儿科学   76301篇
妇产科学   64594篇
基础医学   333955篇
口腔科学   64981篇
临床医学   215810篇
内科学   466710篇
皮肤病学   53727篇
神经病学   190964篇
特种医学   91278篇
外国民族医学   522篇
外科学   348802篇
综合类   52602篇
现状与发展   5篇
一般理论   930篇
预防医学   192322篇
眼科学   51473篇
药学   167751篇
  8篇
中国医学   3909篇
肿瘤学   122932篇
  2018年   24013篇
  2016年   21665篇
  2015年   24483篇
  2014年   34091篇
  2013年   51783篇
  2012年   66283篇
  2011年   71156篇
  2010年   43015篇
  2009年   41719篇
  2008年   67021篇
  2007年   71624篇
  2006年   72167篇
  2005年   70255篇
  2004年   67215篇
  2003年   64999篇
  2002年   62460篇
  2001年   106411篇
  2000年   109040篇
  1999年   91706篇
  1998年   27254篇
  1997年   24561篇
  1996年   25564篇
  1995年   25152篇
  1994年   23393篇
  1993年   21994篇
  1992年   75230篇
  1991年   73587篇
  1990年   71192篇
  1989年   68255篇
  1988年   63318篇
  1987年   62292篇
  1986年   58920篇
  1985年   56572篇
  1984年   43063篇
  1983年   36993篇
  1982年   22745篇
  1981年   20571篇
  1980年   19374篇
  1979年   40063篇
  1978年   29269篇
  1977年   24654篇
  1976年   22668篇
  1975年   24152篇
  1974年   28903篇
  1973年   28056篇
  1972年   26155篇
  1971年   24302篇
  1970年   22570篇
  1969年   21250篇
  1968年   19857篇
排序方式: 共有10000条查询结果,搜索用时 3 毫秒
101.
102.
103.
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   
104.
105.
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   
106.
107.
108.
109.
110.
ABSTRACT

Objective

To investigate primary care physician clinical practice patterns, barriers, and education surrounding pediatric physical activity (PA), and to compare practice patterns by discipline.  相似文献   
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