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   1335994篇
  免费   94290篇
  国内免费   2908篇
耳鼻咽喉   19713篇
儿科学   40237篇
妇产科学   38659篇
基础医学   187220篇
口腔科学   39817篇
临床医学   112637篇
内科学   262383篇
皮肤病学   30205篇
神经病学   106360篇
特种医学   53672篇
外国民族医学   435篇
外科学   208212篇
综合类   31044篇
现状与发展   6篇
一般理论   436篇
预防医学   92046篇
眼科学   31439篇
药学   100063篇
  4篇
中国医学   2987篇
肿瘤学   75617篇
  2018年   11741篇
  2015年   11877篇
  2014年   16690篇
  2013年   25241篇
  2012年   33000篇
  2011年   34869篇
  2010年   20735篇
  2009年   20227篇
  2008年   33575篇
  2007年   36686篇
  2006年   37263篇
  2005年   36018篇
  2004年   35089篇
  2003年   34063篇
  2002年   33592篇
  2001年   63617篇
  2000年   65326篇
  1999年   55389篇
  1998年   14654篇
  1997年   13463篇
  1996年   12938篇
  1995年   12226篇
  1994年   11473篇
  1992年   42761篇
  1991年   41282篇
  1990年   40557篇
  1989年   39555篇
  1988年   36964篇
  1987年   36412篇
  1986年   34901篇
  1985年   33104篇
  1984年   24822篇
  1983年   21053篇
  1982年   12664篇
  1981年   11568篇
  1980年   10772篇
  1979年   23925篇
  1978年   17069篇
  1977年   14835篇
  1976年   13386篇
  1975年   15267篇
  1974年   18081篇
  1973年   17563篇
  1972年   16812篇
  1971年   15717篇
  1970年   14914篇
  1969年   14346篇
  1968年   13461篇
  1967年   12015篇
  1966年   11258篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.
995.
996.
We report a successful endovascular stent-graft treatment of a patient with type A dissection with primary entry tear at the ascending aorta. Simultaneous coronary stenting was performed. A literature review was performed and the possible use of endovascular treatment for ascending aortic dissections is discussed.  相似文献   
997.
Spinal cord stimulation (SCS) involves the use of an epidurally placed, multiple electrode lead. Electrical stimulation between electrodes produces stimulation of the posterior spinal cord and can provide excellent pain relief and increased blood flow in a number of chronic limb pain conditions. Its efficacy has more recently been demonstrated in angina. Chronic stable angina pectoris is a major cause of disability and suffering. The aims of treatment are to prevent MI and death (increase the quantity of life) and reduce the symptoms (improve the quality of life). In the non‐acute condition, practitioners often struggle to manage angina because of a lack of understanding of modern concepts of pain. There is a widely held misconception that only revascularisation improves prognosis in chronic refractory angina‐ the term used to describe patients with stable angina that is treatment refractory. Over the last decade two pain services in New Zealand have been approached by cardiologists to provide spinal cord stimulation for such patients. This has been an intriguing experience! We have demonstrated that the placement of such leads in the lower cervical cord region provides excellent relief of angina. The technology is expensive (akin to the overall cost of CAVG surgery). We have demonstrated cost recoupment, by decreased hospitalisation, at approximately16 months post procedure. Sadly, this therapy has not been embraced. Possible reasons for this will be discussed. The concept of electrically modifying the neuronal signals versus re‐plumbing the blockage appears to be an anathema to cardiologists.  相似文献   
998.
999.
BACKGROUND: Clinical benefit from extended lymphadenectomy for gastric cancer remains controversial as a considerable variation exists between results of different studies. METHODS: 562 patients were treated at HUCH between 1987-2003, whereof 223 underwent gastrectomy with curative intent. Of these, 114 patients underwent subtotal/total gastrectomy with D1 (standard) lymphadenectomy and 109 patients had D2-3 (extended) lymph node dissection. The clinical outcome of these patients was analysed retrospectively. RESULTS: The incidence of surgical complications was 33.0% in D2-3 and 16.8% in D1 lymphadenectomy groups (p = 0.008). Abscess was the most common complication (11.0%) among D2-3 operated patients and haemorrhage (4.4%) in D1 group. Hospital mortality was 3.7% in D2-3 and 1.8% in D1 group (p = 0.438). The only statistically significant factor influencing the rate of complications was D2-3 lymphadenectomy (OR 2.620, 95% C.I. 1.375 to 4.991). D2-3 was associated with a longer postoperative hospital stay and operation time, greater blood loss and increased need for blood transfusions compared to D1. The 5-year survival was not statistically different between lymphadenectomy groups. CONCLUSION: It is justified to perform a D2-3 gastrectomy in Europe with a acceptable postoperative mortality but with a significant morbidity. Further studies are needed to assess the value of extended lymphadenectomy in gastric cancer.  相似文献   
1000.
We report a case of an intra-articular vascular malformation occurring simultaneously with a ganglion in a knee joint. We believe this to be the first reported case of an intra-articular vascular malformation occurring simultaneously with a ganglion. The malformation was cauterized resulting in resolution of knee pain. We suggest that vascular malformations be considered in the differential diagnosis of knee pain.  相似文献   
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