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   141486篇
  免费   8337篇
  国内免费   1189篇
耳鼻咽喉   2271篇
儿科学   2135篇
妇产科学   2094篇
基础医学   22523篇
口腔科学   3603篇
临床医学   13251篇
内科学   25216篇
皮肤病学   4504篇
神经病学   11455篇
特种医学   8029篇
外科学   18553篇
综合类   659篇
现状与发展   3篇
一般理论   37篇
预防医学   7350篇
眼科学   3492篇
药学   12759篇
中国医学   1624篇
肿瘤学   11454篇
  2023年   997篇
  2022年   3027篇
  2021年   4904篇
  2020年   2392篇
  2019年   3339篇
  2018年   4149篇
  2017年   3363篇
  2016年   4427篇
  2015年   6049篇
  2014年   7094篇
  2013年   8353篇
  2012年   12434篇
  2011年   11917篇
  2010年   6890篇
  2009年   5901篇
  2008年   8351篇
  2007年   7860篇
  2006年   7055篇
  2005年   6609篇
  2004年   5739篇
  2003年   4987篇
  2002年   4323篇
  2001年   3311篇
  2000年   3041篇
  1999年   2370篇
  1998年   1015篇
  1997年   767篇
  1996年   576篇
  1995年   504篇
  1994年   453篇
  1993年   392篇
  1992年   852篇
  1991年   821篇
  1990年   748篇
  1989年   660篇
  1988年   553篇
  1987年   557篇
  1986年   416篇
  1985年   438篇
  1984年   307篇
  1983年   233篇
  1982年   161篇
  1981年   193篇
  1980年   151篇
  1979年   279篇
  1978年   207篇
  1977年   148篇
  1976年   157篇
  1975年   174篇
  1974年   170篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
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   
13.
14.
15.
16.
Scrub typhus usually presents as acute undifferentiated fever. This cross-sectional study included adult patients presenting with acute undifferentiated fever defined as any febrile illness for ≤ 14 days without evidence of localized infection. Scrub typhus cases were defined by an antibody titer of a ≥ fourfold increase in paired sera, a ≥ 1:160 in a single serum using indirect immunofluorescence assay, or a positive result of the immunochromatographic test. Multiple regression analysis identified predictors associated with scrub typhus to develop a prediction rule. Of 250 cases with known etiology of acute undifferentiated fever, influenza (28.0%), hepatitis A (25.2%), and scrub typhus (16.4%) were major causes. A prediction rule for identifying suspected cases of scrub typhus consisted of age ≥ 65 years (two points), recent fieldwork/outdoor activities (one point), onset of illness during an outbreak period (two points), myalgia (one point), and eschar (two points). The c statistic was 0.977 (95% confidence interval = 0.960–0.994). At a cutoff value ≥ 4, the sensitivity and specificity were 92.7% (79.0–98.1%) and 90.9% (86.0–94.3%), respectively. Scrub typhus, the third leading cause of acute undifferentiated fever in our region, can be identified early using the prediction rule.  相似文献   
17.
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   
18.
19.
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   
20.
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