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   1773659篇
  免费   131612篇
  国内免费   4093篇
耳鼻咽喉   22629篇
儿科学   57755篇
妇产科学   47681篇
基础医学   251493篇
口腔科学   50212篇
临床医学   160161篇
内科学   349351篇
皮肤病学   39739篇
神经病学   139327篇
特种医学   67041篇
外国民族医学   245篇
外科学   270098篇
综合类   39850篇
现状与发展   4篇
一般理论   655篇
预防医学   131196篇
眼科学   41792篇
药学   128964篇
  7篇
中国医学   4556篇
肿瘤学   106608篇
  2021年   14452篇
  2019年   15240篇
  2018年   22053篇
  2017年   16726篇
  2016年   18226篇
  2015年   20831篇
  2014年   28962篇
  2013年   41899篇
  2012年   58884篇
  2011年   61877篇
  2010年   36537篇
  2009年   34094篇
  2008年   57357篇
  2007年   60875篇
  2006年   61199篇
  2005年   58157篇
  2004年   56313篇
  2003年   53097篇
  2002年   51050篇
  2001年   92477篇
  2000年   94072篇
  1999年   77693篇
  1998年   20756篇
  1997年   18009篇
  1996年   18015篇
  1995年   17300篇
  1994年   15790篇
  1993年   14552篇
  1992年   57736篇
  1991年   55590篇
  1990年   53217篇
  1989年   50972篇
  1988年   46354篇
  1987年   45160篇
  1986年   42417篇
  1985年   40212篇
  1984年   29622篇
  1983年   25119篇
  1982年   14181篇
  1981年   12639篇
  1979年   25609篇
  1978年   17681篇
  1977年   15001篇
  1976年   13939篇
  1975年   14615篇
  1974年   17680篇
  1973年   17005篇
  1972年   15709篇
  1971年   14483篇
  1970年   13453篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
121.
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   
122.
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   
123.
124.
125.
126.
127.
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   
128.
129.
130.
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