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   1601715篇
  免费   131507篇
  国内免费   2581篇
耳鼻咽喉   21646篇
儿科学   52928篇
妇产科学   46225篇
基础医学   227777篇
口腔科学   47202篇
临床医学   140915篇
内科学   314764篇
皮肤病学   34090篇
神经病学   130107篇
特种医学   64751篇
外国民族医学   474篇
外科学   243810篇
综合类   39713篇
现状与发展   3篇
一般理论   544篇
预防医学   122860篇
眼科学   36471篇
药学   121258篇
  3篇
中国医学   2974篇
肿瘤学   87288篇
  2018年   14768篇
  2016年   12901篇
  2015年   15028篇
  2014年   20647篇
  2013年   31352篇
  2012年   42557篇
  2011年   44753篇
  2010年   26338篇
  2009年   25303篇
  2008年   43000篇
  2007年   45241篇
  2006年   46054篇
  2005年   44673篇
  2004年   44094篇
  2003年   42185篇
  2002年   41291篇
  2001年   75683篇
  2000年   78331篇
  1999年   66390篇
  1998年   17731篇
  1997年   16336篇
  1996年   16314篇
  1995年   16019篇
  1994年   15070篇
  1993年   14217篇
  1992年   55429篇
  1991年   53776篇
  1990年   52563篇
  1989年   50832篇
  1988年   47222篇
  1987年   46560篇
  1986年   44284篇
  1985年   42844篇
  1984年   32033篇
  1983年   27566篇
  1982年   16144篇
  1981年   14436篇
  1980年   13564篇
  1979年   30460篇
  1978年   21064篇
  1977年   17767篇
  1976年   16694篇
  1975年   17574篇
  1974年   21489篇
  1973年   20673篇
  1972年   18854篇
  1971年   17770篇
  1970年   16289篇
  1969年   15268篇
  1968年   13949篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
992.
Trotter's syndrome is a clinical triad of unilateral deafness, neuralgia affecting branches of the trigeminal nerve, and defective mobility of the soft palate, which is caused by malignant tumors involving the lateral pharyngeal recess (Rosenmüller's fossa). It is an ominous presentation, which can masquerade as dental or masticatory pain. Computerized tomography (CT) can be used not only to explain the anatomic basis of Trotter's syndrome but also to determine the extent and distribution of the malignant tumor involved. The advantages of CT over conventional radiography are illustrated by a case of adenoid cystic carcinoma that presented as Trotter's syndrome. Perineural invasion by tumor is shown on the gross level for the first time with CT, and important diagnostic considerations, which may aid in the early diagnosis of future cases, are discussed.  相似文献   
993.
As in many other scientific disciplines, in gerontology adaptation is a central term. Yet it is not being used in a standardized way. This article describes the concepts and theoretical approaches which can be identified in Social Gerontology, together with their functions and the results of research.  相似文献   
994.
995.
The case reported here demonstrates the importance of considering the possibility of occult malignancy in young patients presenting with extensive or migratory thromboses in atypical locations that appear resistant to standard therapy. Suspicion for malignancy-related thrombosis is heightened by the absence of known precipitating causes and by a negative family history of thrombosis. The search for the responsible underlying neoplasm can be frustrating, but diagnosis and successful treatment of the tumor remain the keys to controlling the abnormal thrombotic state.  相似文献   
996.
997.
998.
We report histological changes in four patients with port wine stains treated with 578 nm yellow light from a high power copper vapour laser. Histology showed that selective damage occurred to the ectatic blood-vessels in the dermis, without haemorrhage and damage to non-vascular structures, and without scarring. The initial damage to the overlying epidermis was not permanent, and the damaged ectatic vessels returned to normal size or were completely necrosed and replaced by collagen.  相似文献   
999.
The present status of total colectomy with ileorectal anastomosis in the surgical treatment of inflammatory bowel disease is examined. Special reference is made to the different indications for the use of the operation in Crohn's disease and in ulcerative colitis. The late results are illustrated by the outcome in the 59 patients in a personal series, and other published results.  相似文献   
1000.
Synovectomy of the knee in patients with hemophilia presenting in countries with demographic characteristics that make central referral difficult is the subject of this article. Ten patients, six surgeons, and two countries contributed to this study, which demonstrated that approximately 40% of these patients had no further hemarthroses into the affected joint and the remainder had reduced frequency and severity of bleeding. Continuous passive motion has an important place in postoperative management, and manipulation with the patient under anesthesia is of doubtful value. The possible relationship between diminished range of movement and a successful outcome in terms of abolition of hemorrhage is explored. One patient underwent synovectomy of the knee without complication; the other nine suffered significant complications.  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