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   1705896篇
  免费   127518篇
  国内免费   3970篇
耳鼻咽喉   21918篇
儿科学   56087篇
妇产科学   46528篇
基础医学   243156篇
口腔科学   48919篇
临床医学   152320篇
内科学   335643篇
皮肤病学   38901篇
神经病学   132212篇
特种医学   64339篇
外国民族医学   243篇
外科学   259062篇
综合类   39342篇
现状与发展   4篇
一般理论   551篇
预防医学   126354篇
眼科学   40486篇
药学   124521篇
  9篇
中国医学   4604篇
肿瘤学   102185篇
  2021年   13342篇
  2019年   13970篇
  2018年   20495篇
  2017年   15593篇
  2016年   17014篇
  2015年   19428篇
  2014年   26817篇
  2013年   38791篇
  2012年   53961篇
  2011年   56666篇
  2010年   33523篇
  2009年   31259篇
  2008年   52418篇
  2007年   55778篇
  2006年   56176篇
  2005年   53324篇
  2004年   51496篇
  2003年   48852篇
  2002年   46979篇
  2001年   92013篇
  2000年   93803篇
  1999年   77138篇
  1998年   19802篇
  1997年   17353篇
  1996年   17454篇
  1995年   16803篇
  1994年   15346篇
  1993年   14108篇
  1992年   57475篇
  1991年   55355篇
  1990年   53064篇
  1989年   50850篇
  1988年   46216篇
  1987年   45014篇
  1986年   42293篇
  1985年   40055篇
  1984年   29404篇
  1983年   24948篇
  1982年   13917篇
  1979年   25563篇
  1978年   17588篇
  1977年   14917篇
  1976年   13886篇
  1975年   14589篇
  1974年   17645篇
  1973年   16964篇
  1972年   15691篇
  1971年   14467篇
  1970年   13446篇
  1969年   12511篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
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   
112.
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   
113.
114.
115.
116.
117.
Demodex mites are microscopic arachnids found in the normal skin of many mammals. In humans, it is well established that Demodex mite density is higher in patients with the skin condition rosacea, and treatment with acaricidal agents is effective in resolving symptoms. However, pathophysiology of rosacea is complex and multifactorial. In dogs, demodicosis is a significant veterinary issue, particularly the generalized form of the disease which can be fatal if untreated. In each species, clinical and molecular studies have shown that the host’s immunological interactions with Demodex mites are an important, but not fully understood, aspect of how Demodex can live in the skin either as a harmless commensal organism or as a pathogenic agent. This review outlines the role of Demodex mites in humans and dogs, considering morphology, prevalence, symptoms, diagnosis, histology treatment and pathogenesis.  相似文献   
118.
119.
120.
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