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   45293篇
  免费   2416篇
  国内免费   162篇
耳鼻咽喉   667篇
儿科学   2804篇
妇产科学   819篇
基础医学   5254篇
口腔科学   1293篇
临床医学   3229篇
内科学   8293篇
皮肤病学   1195篇
神经病学   2671篇
特种医学   1385篇
外科学   7209篇
综合类   1358篇
现状与发展   1篇
一般理论   22篇
预防医学   2200篇
眼科学   1560篇
药学   4362篇
  2篇
中国医学   364篇
肿瘤学   3183篇
  2023年   348篇
  2022年   1013篇
  2021年   1757篇
  2020年   945篇
  2019年   1085篇
  2018年   1511篇
  2017年   1116篇
  2016年   1441篇
  2015年   1496篇
  2014年   2190篇
  2013年   2505篇
  2012年   3564篇
  2011年   3544篇
  2010年   2101篇
  2009年   1705篇
  2008年   2412篇
  2007年   2464篇
  2006年   2248篇
  2005年   2045篇
  2004年   1895篇
  2003年   1628篇
  2002年   1418篇
  2001年   827篇
  2000年   744篇
  1999年   622篇
  1998年   304篇
  1997年   250篇
  1996年   244篇
  1995年   209篇
  1994年   184篇
  1993年   155篇
  1992年   367篇
  1991年   367篇
  1990年   374篇
  1989年   348篇
  1988年   293篇
  1987年   249篇
  1986年   237篇
  1985年   236篇
  1984年   182篇
  1983年   130篇
  1982年   79篇
  1981年   84篇
  1980年   73篇
  1979年   115篇
  1978年   72篇
  1977年   91篇
  1976年   68篇
  1973年   62篇
  1971年   61篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
71.
72.
Velopharyngeal incompetence (VPI) is a condition of incomplete closure of V.P. port area, normally formed by velum and posterior pharyngeal watt. The condition primarily results in various types of speech defects, which form- the main complaint of the patient. We have studied 10 cases of VPI due to various causes and the speech improvement obtained by flap pharyngoplasty procedures. The results have been evaluated with a follow-up of six months. Highly encouraging results only indicate a more frequent need to undertake such surgery without any hesitation if the ENT surgeon is familiar with and has an adequate exposure to this simple and effective procedure.  相似文献   
73.
Defects involving the distal leg and foot are frequently encountered following various aetiological factors. Paucity of local tissue causes surgeons to resort to the retrograde peninsular flap, the cross leg flap or the free flap. With specific knowledge of perforators, the fasciocutaneous flap from the calf area can be transferred to the defect in a single stage based on skeletonised distal perforators. The surgical anatomy, flap planning and procedure have been detailed. Nineteen patients were treated during the period 1995 to 2005. The perforators were identified preoperatively by audio Doppler. The flaps were marked and dissected proximal to the defect skeletonising the distal perforators under loupe magnification and transferred to the defect in a single stage. The donor site was skin grafted. Out of 19 cases, 16 flaps healed uneventfully, one flap necrosed completely and in two cases there was marginal necrosis. The cases were followed up for 2-10 years with an average of 6 years. With detailed knowledge of perforators one can safely reconstruct distal moderate-size defects of the lower limb in a single stage, thus having the benefits of free tissue transfer without resorting to microsurgery. This technique has proved to be an advancement in the reconstructive repertoire allowing flaps of non conventional dimensions to be perfused by skeletonised perforators.  相似文献   
74.
The treatment of Legg-Calvé-Perthes disease remains controversial. The aim of this survey was to ascertain the current management strategies of this condition amongst UK paediatric orthopaedic surgeons, with particular regard to containment procedures in the fragmentation phase. Questionnaires were distributed at the January 2006 meeting of the British Society for Children’s Orthopaedic Surgery (BSCOS) and was posted to all absent members. The results showed a great deal of variability not only in the treatment of Perthes disease, but also in the decision-making processes. Consideration must now be given to a carefully constructed national multi-centre prospective randomised controlled study into the optimum management of this disease  相似文献   
75.
76.
Laparoscopic cholecystectomy for left-sided gallbladder (sinistroposition).   总被引:1,自引:0,他引:1  
Transposition of the gallbladder to the left side without situs inversus viscerum is rare. These gallbladders are situated under the left lobe of the liver between Segment III and IV or on Segment III to the left of the falciform ligament. Because routine preoperative studies may not detect the anomaly, it may provide the surgeons with an unusual surprise during laparoscopy. Awareness of the unpredictable confluence of the cystic duct into the common bile duct and selective use of intraoperative cholangiography aid in the safe laparoscopic management of this unusual problem.  相似文献   
77.
78.
79.
80.
Extrame dullary plasmacytoma of larynx is extremely rare. We report a case of multiple myeloma which presented as extrame dullary manifestation in larynx. The rarity of incidence and difficulty in diagnosis of the disease is discussed.  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