首页 | 官方网站   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   1023952篇
  免费   77158篇
  国内免费   24029篇
医药卫生   1125139篇
  2022年   15333篇
  2021年   21623篇
  2020年   15323篇
  2019年   16124篇
  2018年   19110篇
  2017年   15898篇
  2016年   16022篇
  2015年   21721篇
  2014年   27817篇
  2013年   30499篇
  2012年   42920篇
  2011年   46965篇
  2010年   28450篇
  2009年   24029篇
  2008年   36708篇
  2007年   38233篇
  2006年   38671篇
  2005年   36964篇
  2004年   30428篇
  2003年   28537篇
  2002年   26742篇
  2001年   43320篇
  2000年   44720篇
  1999年   39039篇
  1998年   13264篇
  1997年   12079篇
  1996年   11253篇
  1995年   10507篇
  1994年   9271篇
  1993年   7660篇
  1992年   25654篇
  1991年   25204篇
  1990年   24324篇
  1989年   23839篇
  1988年   21526篇
  1987年   20694篇
  1986年   19502篇
  1985年   18140篇
  1984年   13172篇
  1983年   11087篇
  1979年   11726篇
  1978年   8201篇
  1977年   6917篇
  1976年   6659篇
  1975年   7330篇
  1974年   8591篇
  1973年   8213篇
  1972年   7730篇
  1971年   7173篇
  1970年   6929篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
The present study aimed at examining the curative effect of modified posterior operation on treatment of Kümmell''s disease.About 30 patients of Kümmell''s disease with complete image and clinical data treated during June 2004 to July 2013 were conducted with anterior and posterior approaches, respectively. Kyphotic Cobb angle, fractured vertebra wedge angle, and the anterior and posterior heights of fractured vertebra were all measured through x-ray before and after operation, and the pain visual analog scale (VAS) was determined for evaluating the effect of operations. The injury and restoration of neurological function were assessed using Frankel classification.Patients in group A were treated with anterior operation, whereas group B was posterior operation. Postoperatively, VAS score, kyphotic Cobb angle, anterior vertebra height, and pathologic vertebra wedge angle were all significantly improved in patients with Kümmell''s disease receiving modified posterior operation (group B). Similar results were also observed in patients with anterior operation. The improvement of VAS and correction rate of kyphotic Cobb angle indicated equivalent effects of posterior and anterior operations. Meanwhile, alleviated neurological function damage was observed in 2 groups. Relevant factor analysis illustrated that there was no significant correlation of the severity and improvement rate of pain symptoms with age, medical history, anterior and posterior vertebra heights, kyphotic Cobb angle, and pathological vertebra wedge angle.Compared with traditional anterior approach, modified posterior operation, adopting transpedicular vertebral body grafting combined with vertebral pedicle screw fixation, could produce equivalent effects on kyphosis correction, pain relief, and improvement of neurological function in patients with Kümmell''s disease.  相似文献   
2.
3.
We report two British cases of liver abscess, due to Klebsiella pneumoniae and associated with synchronous infection elsewhere, which required liver resection for definitive treatment. They illustrate the geographic spread of aggressive K pneumoniae liver infection and demonstrate the importance of early aggressive treatment.  相似文献   
4.
5.
6.
7.
8.
Haemophilia is a common cause of genetically inherited bleeding disorders. Pseudotumours occur in 1–2 % of persons with severe forms of haemophilia. These are a result of repeated haemorrhage into soft tissues, subperiosteum or a site of bone fracture with inadequate resorption of the extravasated blood. There are a number of therapeutic alternatives for this dangerous condition: surgical removal, percutaneous management, irradiation, embolization etc. In this case report, we describe the natural history, clinical course and successful surgical management of a patient with haemophilia who presented with a massive pseudotumour. We also briefly review the relevant literature on the various therapeutic modalities that have been implemented in the management of this rare complication. Though surgeons may be averse to operate on haemophiliacs, primary surgical management as done in our case may prove to be the definitive treatment option for such patients.  相似文献   
9.
10.
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-23

京公网安备 11010802026262号