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   1359445篇
  免费   104600篇
  国内免费   6390篇
耳鼻咽喉   16994篇
儿科学   43855篇
妇产科学   36651篇
基础医学   201214篇
口腔科学   36328篇
临床医学   133205篇
内科学   262133篇
皮肤病学   26595篇
神经病学   113158篇
特种医学   49119篇
外国民族医学   387篇
外科学   186689篇
综合类   33037篇
现状与发展   10篇
一般理论   464篇
预防医学   115907篇
眼科学   29665篇
药学   101484篇
  36篇
中国医学   4631篇
肿瘤学   78873篇
  2021年   12485篇
  2019年   12569篇
  2018年   17322篇
  2017年   13156篇
  2016年   14065篇
  2015年   16515篇
  2014年   22420篇
  2013年   33304篇
  2012年   46141篇
  2011年   49015篇
  2010年   28368篇
  2009年   25934篇
  2008年   44035篇
  2007年   46434篇
  2006年   46467篇
  2005年   45041篇
  2004年   42391篇
  2003年   40242篇
  2002年   39004篇
  2001年   61365篇
  2000年   63043篇
  1999年   52881篇
  1998年   15055篇
  1997年   13722篇
  1996年   13496篇
  1995年   12801篇
  1994年   11895篇
  1993年   11076篇
  1992年   41761篇
  1991年   40901篇
  1990年   39565篇
  1989年   37458篇
  1988年   34715篇
  1987年   33773篇
  1986年   32218篇
  1985年   30695篇
  1984年   23063篇
  1983年   19617篇
  1982年   11772篇
  1979年   20819篇
  1978年   14816篇
  1977年   12066篇
  1976年   11876篇
  1975年   12112篇
  1974年   14800篇
  1973年   14474篇
  1972年   13357篇
  1971年   12423篇
  1970年   11485篇
  1969年   10415篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
104.
There is a large and growing population of long-term cancer survivors. Primary care physicians (PCPs) are playing an increasingly greater role in the care of these patients across the continuum of cancer survivorship. In this role, PCPs are faced with the responsibility of managing a range of medical and psychosocial late effects of cancer treatment. In particular, the sexual side effects of treatment which are common and have significant impact on quality of life for the cancer survivor, often go unaddressed. This is an area of clinical care and research that has received increasing attention, highlighted by the presentation of this special issue on Cancer and Sexual Health. The aims of this review are 3-fold. First, we seek to overview common presentations of sexual dysfunction related to major cancer diagnoses in order to give the PCP a sense of the medical issues that the survivor may present with. Barriers to communication about sexual health issues between patient/PCPs in order are also described in order to emphasize the importance of PCPs initiating this important conversation. Next, we provide strategies and resources to help guide the PCP in the management of sexual dysfunction in cancer survivors. Finally, we discuss case examples of survivorship sexual health issues and highlight the role that a PCP can play in each of these case examples.  相似文献   
105.
106.
107.
108.

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   
109.
Patients with mechanic ankle instability experience increased tibiotalar and subtalar joint laxity. However, in vivo joint kinematics in functional ankle instability (FAI) patients and lateral ankle sprain (LAS) copers, especially during dynamic activities, are poorly understood. Ten FAI patients, 10 LAS copers, and 10 healthy controls were included in this study. A dual fluoroscopic imaging system was used to analyze the tibiotalar and subtalar joint kinematics during stair descent. Five key poses of stair descent were analyzed. Kinematic data from six degrees of freedom were calculated utilizing a solid modeling software. The range of motion and joint positions in each degree of freedom were compared among the three groups. The tibiotalar joints of FAI patients and LAS copers were significantly more inverted than those of healthy controls during the foot strike (p = 0.016, = 0.264). The subtalar joints of FAI patients were significantly more anteriorly translated (pose 2, p = 0.003, = 0.352; pose 3, p < 0.001, = 0.454; pose 4, p = 0.004, = 0.334), inverted (pose 4, p = 0.027, = 0.234; pose 5,p = 0.034, = 0.221), and externally rotated (pose 4, p = 0.037, = 0.217; pose 5; p = 0.004, = 0.331) than those of healthy controls during the mid‐stance and the heel off. The FAI patients showed excessive tibiotalar inversion and subtalar joint hypermobility during stair descent. Meanwhile, the LAS copers maintained subtalar joint stability, and only showed excessive tibiotalar inversion in foot strike. These data provide insight into the mechanisms behind the development of FAI after initial LAS. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:1860–1867, 2019  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