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   2393947篇
  免费   182836篇
  国内免费   4597篇
耳鼻咽喉   31777篇
儿科学   78896篇
妇产科学   68054篇
基础医学   348372篇
口腔科学   66161篇
临床医学   220606篇
内科学   469031篇
皮肤病学   53655篇
神经病学   195389篇
特种医学   89836篇
外国民族医学   702篇
外科学   347888篇
综合类   53694篇
现状与发展   4篇
一般理论   974篇
预防医学   194058篇
眼科学   54527篇
药学   171791篇
  7篇
中国医学   4927篇
肿瘤学   131031篇
  2019年   19227篇
  2018年   26529篇
  2017年   20268篇
  2016年   22610篇
  2015年   25561篇
  2014年   35991篇
  2013年   54355篇
  2012年   73681篇
  2011年   78579篇
  2010年   46010篇
  2009年   44066篇
  2008年   73293篇
  2007年   78103篇
  2006年   78138篇
  2005年   76069篇
  2004年   73016篇
  2003年   69717篇
  2002年   67510篇
  2001年   111936篇
  2000年   114283篇
  1999年   95432篇
  1998年   27185篇
  1997年   24670篇
  1996年   25001篇
  1995年   23713篇
  1994年   21795篇
  1993年   20379篇
  1992年   73890篇
  1991年   71743篇
  1990年   69119篇
  1989年   66573篇
  1988年   61369篇
  1987年   60012篇
  1986年   56599篇
  1985年   53805篇
  1984年   41049篇
  1983年   35313篇
  1982年   21218篇
  1981年   19207篇
  1979年   37656篇
  1978年   27219篇
  1977年   22672篇
  1976年   21225篇
  1975年   22342篇
  1974年   27138篇
  1973年   26477篇
  1972年   24962篇
  1971年   22997篇
  1970年   21736篇
  1969年   20376篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
41.
42.
43.
44.
45.
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   
46.
47.
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   
48.
49.
50.
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