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   1453423篇
  免费   107304篇
  国内免费   4702篇
耳鼻咽喉   18866篇
儿科学   46840篇
妇产科学   39229篇
基础医学   213861篇
口腔科学   40521篇
临床医学   137332篇
内科学   286903篇
皮肤病学   30279篇
神经病学   121837篇
特种医学   50889篇
外国民族医学   368篇
外科学   198092篇
综合类   29532篇
现状与发展   1篇
一般理论   496篇
预防医学   126426篇
眼科学   31610篇
药学   107493篇
  6篇
中国医学   3850篇
肿瘤学   80998篇
  2021年   14388篇
  2019年   14817篇
  2018年   20791篇
  2017年   14968篇
  2016年   15784篇
  2015年   18056篇
  2014年   24704篇
  2013年   37614篇
  2012年   52926篇
  2011年   56204篇
  2010年   32076篇
  2009年   28763篇
  2008年   49737篇
  2007年   52486篇
  2006年   51999篇
  2005年   50382篇
  2004年   47618篇
  2003年   45106篇
  2002年   43511篇
  2001年   63663篇
  2000年   65664篇
  1999年   54800篇
  1998年   15212篇
  1997年   13781篇
  1996年   13504篇
  1995年   12785篇
  1994年   11896篇
  1993年   11153篇
  1992年   42550篇
  1991年   41579篇
  1990年   40189篇
  1989年   37982篇
  1988年   35154篇
  1987年   34229篇
  1986年   32678篇
  1985年   31087篇
  1984年   23369篇
  1983年   19900篇
  1982年   11943篇
  1979年   21130篇
  1978年   15047篇
  1977年   12238篇
  1976年   12064篇
  1975年   12353篇
  1974年   15118篇
  1973年   14774篇
  1972年   13626篇
  1971年   12711篇
  1970年   11742篇
  1969年   10681篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
122.
123.

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   
124.
125.
126.
127.
Eccrine naevus (EN) is a rare skin hamartoma included in the organoid group of epidermal naevi, histologically defined as focal hyperplasia and/or hypertrophy of eccrine glands. Clinically, EN usually presents as hyperhidrotic patches with no visible skin changes, frequently located on the forearms. The decision to treat EN or not usually depends on the grade of hyperhidrosis, but there is no therapeutic consensus because of the rarity of this condition. We present a case diagnosed as EN in an adult patient with severe localized hyperhidrosis, which was successfully treated with botulinum toxin.  相似文献   
128.
129.
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   
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