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   193295篇
  免费   13686篇
  国内免费   5566篇
耳鼻咽喉   2510篇
儿科学   2866篇
妇产科学   2433篇
基础医学   27307篇
口腔科学   4212篇
临床医学   19982篇
内科学   32601篇
皮肤病学   4669篇
神经病学   13706篇
特种医学   9985篇
外国民族医学   23篇
外科学   23830篇
综合类   12752篇
现状与发展   22篇
一般理论   35篇
预防医学   11581篇
眼科学   4636篇
药学   18500篇
  61篇
中国医学   5234篇
肿瘤学   15602篇
  2024年   279篇
  2023年   1805篇
  2022年   4928篇
  2021年   7374篇
  2020年   4479篇
  2019年   5054篇
  2018年   5906篇
  2017年   5063篇
  2016年   6021篇
  2015年   8420篇
  2014年   10047篇
  2013年   11183篇
  2012年   16302篇
  2011年   16255篇
  2010年   10240篇
  2009年   8606篇
  2008年   11323篇
  2007年   11009篇
  2006年   9991篇
  2005年   9347篇
  2004年   7916篇
  2003年   7449篇
  2002年   6389篇
  2001年   4961篇
  2000年   4188篇
  1999年   3348篇
  1998年   1594篇
  1997年   1363篇
  1996年   963篇
  1995年   935篇
  1994年   764篇
  1993年   551篇
  1992年   1058篇
  1991年   939篇
  1990年   840篇
  1989年   763篇
  1988年   602篇
  1987年   621篇
  1986年   473篇
  1985年   441篇
  1984年   315篇
  1983年   224篇
  1982年   168篇
  1981年   192篇
  1980年   150篇
  1979年   249篇
  1978年   173篇
  1976年   142篇
  1974年   155篇
  1973年   138篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
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   
3.
4.
Direct peroral cholangioscopy (POC) using an ultra‐slim upper endoscope is one modality of POC for intraductal endoscopic evaluation and treatment of the bile duct. Choledochoduodenostomy (CDS) is one modality of biliary bypass surgery that provides a new route to the bile duct. We carried out direct POC using an ultra‐slim upper endoscope without the use of accessories in 10 patients (four sump syndromes, three bile duct strictures and three intrahepatic duct stones) previously undergoing surgical CDS. Direct POC was successful in all patients. The use of an intraductal balloon catheter was required in one patient for advancement of the endoscope into the bile duct. Distal bile ducts with sump syndromes were cleared using baskets and water irrigation under direct POC. Cholangiocarcinoma was diagnosed in one patient with hilar bile duct stricture after cholangioscopic evaluation and a targeting forceps biopsy under direct POC. Intrahepatic duct stones were successfully extracted after intraductal fragmentation under direct POC. Oozing bleeding occurred during intraductal lithotripsy but stopped spontaneously. Direct POC using an ultra‐slim upper endoscope without the assistance of accessories can easily be carried out in patients undergoing CDS.  相似文献   
5.
6.
7.
8.
European Journal of Orthopaedic Surgery & Traumatology - The goals of this study were to compare patient satisfaction and wound-related complications in patients receiving 2-octyl cyanoacrylate...  相似文献   
9.
10.
Synovial chondromatosis is a rare lesion in the wrist, but some cases in the distal radioulnar joint have been reported and previous case reports emphasize joint calcifications, shown on preoperative plain radiographs. We report an extremely uncommon case of synovial chondromatosis in the pisotriquetral joint, in which radiographs and magnetic resonance imaging did not demonstrate apparent calcified bodies. In our case, for the accurate diagnosis and treatment, surgical exploration of the joint and synovectomy with removal of loose bodies was performed.  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