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   2449989篇
  免费   171797篇
  国内免费   4815篇
耳鼻咽喉   33021篇
儿科学   80119篇
妇产科学   67092篇
基础医学   348925篇
口腔科学   70951篇
临床医学   221231篇
内科学   469789篇
皮肤病学   55793篇
神经病学   189664篇
特种医学   93490篇
外国民族医学   437篇
外科学   369828篇
综合类   53909篇
现状与发展   5篇
一般理论   757篇
预防医学   179950篇
眼科学   57985篇
药学   185026篇
  13篇
中国医学   6184篇
肿瘤学   142432篇
  2021年   18374篇
  2019年   19009篇
  2018年   27592篇
  2017年   21199篇
  2016年   23560篇
  2015年   26642篇
  2014年   36811篇
  2013年   53866篇
  2012年   74271篇
  2011年   78280篇
  2010年   46435篇
  2009年   43367篇
  2008年   72493篇
  2007年   77346篇
  2006年   78000篇
  2005年   74534篇
  2004年   71681篇
  2003年   68478篇
  2002年   65931篇
  2001年   127898篇
  2000年   130897篇
  1999年   108562篇
  1998年   28411篇
  1997年   24854篇
  1996年   24934篇
  1995年   23827篇
  1994年   21747篇
  1993年   20324篇
  1992年   81986篇
  1991年   79076篇
  1990年   76856篇
  1989年   73764篇
  1988年   67056篇
  1987年   65339篇
  1986年   61755篇
  1985年   58527篇
  1984年   42859篇
  1983年   36482篇
  1982年   20483篇
  1979年   38163篇
  1978年   26241篇
  1977年   22831篇
  1976年   20711篇
  1975年   22520篇
  1974年   26906篇
  1973年   25930篇
  1972年   24220篇
  1971年   22608篇
  1970年   20906篇
  1969年   19769篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
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   
72.
73.
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   
74.
75.
76.
77.
78.
79.
80.
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