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   1348459篇
  免费   102690篇
  国内免费   4291篇
耳鼻咽喉   17303篇
儿科学   45029篇
妇产科学   36912篇
基础医学   198712篇
口腔科学   36902篇
临床医学   130575篇
内科学   260637篇
皮肤病学   26788篇
神经病学   112749篇
特种医学   48889篇
外国民族医学   366篇
外科学   187551篇
综合类   29097篇
现状与发展   1篇
一般理论   467篇
预防医学   114637篇
眼科学   29486篇
药学   99575篇
  6篇
中国医学   3258篇
肿瘤学   76500篇
  2021年   11223篇
  2019年   11934篇
  2018年   16747篇
  2017年   12673篇
  2016年   13720篇
  2015年   15609篇
  2014年   21385篇
  2013年   32854篇
  2012年   45196篇
  2011年   47873篇
  2010年   27618篇
  2009年   25306篇
  2008年   43539篇
  2007年   45994篇
  2006年   46124篇
  2005年   44576篇
  2004年   42572篇
  2003年   40481篇
  2002年   39265篇
  2001年   61488篇
  2000年   63050篇
  1999年   52745篇
  1998年   14739篇
  1997年   13402篇
  1996年   13248篇
  1995年   12515篇
  1994年   11678篇
  1993年   10952篇
  1992年   41654篇
  1991年   40830篇
  1990年   39503篇
  1989年   37400篇
  1988年   34610篇
  1987年   33717篇
  1986年   32175篇
  1985年   30665篇
  1984年   23056篇
  1983年   19602篇
  1982年   11758篇
  1979年   20812篇
  1978年   14822篇
  1977年   12069篇
  1976年   11883篇
  1975年   12111篇
  1974年   14807篇
  1973年   14475篇
  1972年   13366篇
  1971年   12425篇
  1970年   11489篇
  1969年   10410篇
排序方式: 共有10000条查询结果,搜索用时 281 毫秒
101.
102.
103.

Background

Arterial vascular anomalies in patients undergoing kidney transplantation (KT) are correlated with a higher incidence of early surgical complications, potentially causing graft loss. Arterial reconstruction allows patients to overcome these surgical challenges, thus minimizing the risk of poor outcomes. The aim of the present study is to retrospectively investigate the safety and effectiveness of the multiple arterial reconstruction technique with a Teflon patch in case of an unavailable aortic patch: to do so, surgical complications, graft function, and patient survival were evaluated.

Methods

During the period January 2009 to August 2016, 202 adult deceased-donor KTs were performed at our center. Group A (n = 27; reconstruction of multiple arteries) and Group B (n = 175; control group) were compared.

Results

No differences were observed between the 2 groups in terms of early postoperative course, with no vascular complication observed in Group A. No vascular patch infections were reported, nor longer cold ischemia time rates. Similarly, long-term survival rates were similar between the 2 groups.

Conclusions

The Teflon-patch arterial reconstruction technique appears to be safe and effective, with an acceptable balance of benefits and potential risks of using a prosthetic material. Studies based on larger series are needed to further validate this approach.  相似文献   
104.
105.
Dermatophytid reactions are secondary eruptions in response to dermatophytosis. Only a few cases demonstrating an association between dermatophytid reactions and tinea capitis have been reported. Dermatophytid reactions were evaluated in patients diagnosed with kerion celsi. Patients admitted to the dermatology clinic of Van Regional Training and Research Hospital between November 22, 2012, and July 1, 2013, diagnosed with kerion celsi were evaluated for dermatophytid reactions. Six girls (32%) and 13 boys (68%) were included in this study. Dermatophytid reactions were detected in 13 of the 19 patients (68%). Seven patients (36.84%) had eczematous patches or plaques and three (15.8%) had papules. Eczematous lesions, papules, and pustules were noted in two patients (10.5%) and one (5.3%) had signs of an angioedema‐like reaction. Dermatophytid reactions in all patients were observed before the initiation of therapy. According to our clinical experiences, dermatophytid reactions in patients with kerion celsi were more common than reported. Eczematous scaly patches or plaques were the most frequently seen forms of dermatophytid in patients with kerion celsi. Dermatophytid reactions may occur before or after initiation of systemic antifungal therapy. Recognition of this reaction is important so that dermatophytids can be distinguished from drug reactions and the decision can be made whether to continue or to stop the systemic antifungal treatment.  相似文献   
106.
107.
108.
109.
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   
110.
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