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   177294篇
  免费   1033篇
  国内免费   15篇
耳鼻咽喉   1190篇
儿科学   6819篇
妇产科学   3132篇
基础医学   16635篇
口腔科学   1628篇
临床医学   12555篇
内科学   31094篇
皮肤病学   777篇
神经病学   16493篇
特种医学   8985篇
外科学   28992篇
综合类   2372篇
预防医学   18230篇
眼科学   2793篇
药学   9619篇
中国医学   641篇
肿瘤学   16387篇
  2023年   52篇
  2022年   99篇
  2021年   147篇
  2020年   97篇
  2019年   157篇
  2018年   22026篇
  2017年   17443篇
  2016年   19637篇
  2015年   1004篇
  2014年   924篇
  2013年   933篇
  2012年   7149篇
  2011年   21154篇
  2010年   18875篇
  2009年   11577篇
  2008年   19562篇
  2007年   21783篇
  2006年   628篇
  2005年   2248篇
  2004年   3436篇
  2003年   4346篇
  2002年   2492篇
  2001年   262篇
  2000年   401篇
  1999年   158篇
  1998年   198篇
  1997年   203篇
  1996年   89篇
  1995年   100篇
  1994年   98篇
  1993年   58篇
  1992年   38篇
  1991年   84篇
  1990年   122篇
  1989年   75篇
  1988年   53篇
  1987年   40篇
  1986年   22篇
  1985年   29篇
  1984年   21篇
  1983年   22篇
  1982年   24篇
  1980年   40篇
  1939年   20篇
  1938年   60篇
  1937年   25篇
  1935年   22篇
  1934年   30篇
  1932年   56篇
  1930年   46篇
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
121.

Background  

Different interventions can reduce the burden of the chronic low back pain. One example is the use of a 'Back School Programme'. This is a brief therapy that uses a health education method to empower participants through a procedure of assessment, education and skill development. This study aimed to evaluate to what extent the programme could improve quality of life in those who suffer from the condition.  相似文献   
122.

Background  

Despite considerable knowledge about musculoskeletal disorders (MSD) and physical, psychosocial and individual risk factors there is limited knowledge about physical activity as a factor in preventing MSD. In addition, studies of physical activity are often limited to either leisure activity or physical activity at work. Studies among military personnel on the association between physical activity at work and at leisure and MSD are lacking. This study was conducted to find the prevalence of MSD among personnel in the Royal Norwegian Navy and to assess the association between physical activity at work and at leisure and MSD.  相似文献   
123.
Symptomatic biliary leakage following major upper abdominal surgery is a severe complication resulting in increased morbidity and mortality. Treatment options usually include either endoscopic intervention or surgical revision. These options may be burdened by a high perioperative risk for the patient (e.g., patients with severe disease) or simply may not be possible (e.g., nonpreserved gastroduodenal passage). In the past, percutaneous transhepatic cholangiodrainage did only seem to be a viable option for patients with dilated bile ducts. Here, we present our experience in a consecutive series of patients with symptomatic biliary leakage following major upper abdominal surgery and without dilation of the biliary system that underwent percutaneous transhepatic cholangiodrainage. Percutaneous transhepatic cholangiodrainage was feasible in 15 of 18 patients (83.3%). The procedure was technically not possible in three patients (16.7%). In 10 of the 15 patients (66.6%) with feasible percutaneous transhepatic cholangiodrainage, biliary leakage was definitely controlled without the need for surgical revision. Depending on the experience with the interventional procedure, percutaneous transhepatic cholangiodrainage should be considered as an alternative for treatment of symptomatic biliary leakage instead of immediate reoperation. Presented at the Digestive Disease Week 2005 (DDW), Chicago, IL, May 14–19, 2005 (poster presentation).  相似文献   
124.
Lateral unicompartmental knee arthroplasty (UKA) is a valid alternative treatment in the event of arthritis confined to the lateral compartment. This paper examines its indications, technique and short to medium-term results. A total of 159 Miller–Galante cemented UKA prostheses (Zimmer, Warsaw, Indiana) were implanted consecutively (131 medial and 28 lateral) by the same surgeon. This study investigates 28 lateral UKAs in 27 patients. Twenty-five implants in 24 patients (including a subject operated bilaterally) were followed up for 12–60 months. Three patients were discarded on account of to short a follow-up period. The Hospital for Special Surgery (HSS) knee score was used to compare the pre- and post-operative results of the lateral UKA patients. The HSS score improved from a pre-op mean of 59.92 (range 48–68) to 88.04 (range 71–95) at the last follow-up. There was a positive increase in the pain, function and ROM components of the score. The lateral UKA prosthesis can be regarded as a sound alternative to total knee replacement. Correct patient selection on the basis of optimum surgical indications, however, is essential. No benefits of funds were received in support of the study.  相似文献   
125.
126.
127.
Tracheal rupture represents a rare but serious complication of intubation. We discuss a case of a major post-intubation rupture. After investigation with CT scan tracheoscopy and bronchoscopy a low tracheostomy was formed protecting the rupture from pressure changes associated with ventilation. The patient was managed with minimal surgical intervention, low tracheostomy with antibiotic cover and monitoring in the intensive care unit for 24 h before being woken and moved to a ward after 48 h. The patient made a full and uncomplicated recovery and was discharged 2 weeks after the original injury. Most of the literature on the subject is made up of review of case reports that conclude management of such a major tear must be with surgical repair. This however confers significant morbidity and an associated high mortality. We suggest an alternative management protocol.  相似文献   
128.
129.
130.
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