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   2453070篇
  免费   175180篇
  国内免费   5940篇
耳鼻咽喉   34132篇
儿科学   81339篇
妇产科学   69570篇
基础医学   359343篇
口腔科学   68417篇
临床医学   223828篇
内科学   470349篇
皮肤病学   50760篇
神经病学   199995篇
特种医学   93633篇
外国民族医学   717篇
外科学   360290篇
综合类   51546篇
现状与发展   2篇
一般理论   762篇
预防医学   193744篇
眼科学   55846篇
药学   183602篇
  7篇
中国医学   5252篇
肿瘤学   131056篇
  2018年   27066篇
  2017年   20507篇
  2016年   23129篇
  2015年   26416篇
  2014年   35652篇
  2013年   54694篇
  2012年   75654篇
  2011年   80026篇
  2010年   46988篇
  2009年   43302篇
  2008年   75328篇
  2007年   80547篇
  2006年   81380篇
  2005年   79472篇
  2004年   75977篇
  2003年   73184篇
  2002年   71569篇
  2001年   107212篇
  2000年   109937篇
  1999年   93049篇
  1998年   26919篇
  1997年   24220篇
  1996年   23949篇
  1995年   22591篇
  1994年   21289篇
  1993年   19859篇
  1992年   73749篇
  1991年   72647篇
  1990年   70944篇
  1989年   68239篇
  1988年   63264篇
  1987年   61845篇
  1986年   59083篇
  1985年   56581篇
  1984年   42541篇
  1983年   36500篇
  1982年   22088篇
  1981年   19615篇
  1979年   39838篇
  1978年   28244篇
  1977年   23840篇
  1976年   22916篇
  1975年   24510篇
  1974年   29261篇
  1973年   28478篇
  1972年   26790篇
  1971年   24865篇
  1970年   23121篇
  1969年   21782篇
  1968年   20602篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
94.
95.
96.
97.
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   
98.
99.
100.
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   
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