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   24938篇
  免费   1216篇
  国内免费   89篇
耳鼻咽喉   332篇
儿科学   1391篇
妇产科学   608篇
基础医学   2760篇
口腔科学   562篇
临床医学   1449篇
内科学   5251篇
皮肤病学   776篇
神经病学   1516篇
特种医学   872篇
外科学   3197篇
综合类   759篇
一般理论   15篇
预防医学   1237篇
眼科学   1391篇
药学   2256篇
中国医学   179篇
肿瘤学   1692篇
  2023年   172篇
  2022年   424篇
  2021年   866篇
  2020年   425篇
  2019年   554篇
  2018年   705篇
  2017年   488篇
  2016年   608篇
  2015年   571篇
  2014年   915篇
  2013年   1114篇
  2012年   1572篇
  2011年   1713篇
  2010年   930篇
  2009年   767篇
  2008年   1176篇
  2007年   1230篇
  2006年   1233篇
  2005年   1052篇
  2004年   962篇
  2003年   823篇
  2002年   751篇
  2001年   703篇
  2000年   703篇
  1999年   557篇
  1998年   245篇
  1997年   183篇
  1996年   155篇
  1995年   160篇
  1994年   127篇
  1993年   112篇
  1992年   369篇
  1991年   374篇
  1990年   341篇
  1989年   337篇
  1988年   292篇
  1987年   257篇
  1986年   243篇
  1985年   238篇
  1984年   174篇
  1983年   137篇
  1982年   79篇
  1981年   93篇
  1979年   162篇
  1978年   100篇
  1977年   88篇
  1975年   92篇
  1974年   100篇
  1973年   92篇
  1972年   120篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
82.
83.
Intradural cavernomas are rare vascular lesions of the spinal cord. Four cases of histologically verified cavernomas of the cord are reported, of which two were extramedullary and two were intramedullary in location. Progressive neurological deficit was the presenting feature in three cases while one patient had a rapid evolution of neurological deficits and was found at surgery to have had bled from the extramedullary lesion. All the patients were subjected to surgery and total excision of the cavernomas was carried out in each case. While two patients improved after surgery the other two remained static. The available literature on spinal cord cavernomas is reviewed.  相似文献   
84.
85.
Primary amyloidosis of larynx is an uncommon phenomenon, the precise etiopathogenesis of which is not yet clear. It can present with slowly increasing hoarseness or difficulty in breathing. It presents more commonly as infiltrative lesion, exophytic presentation is a rare occurrence.  相似文献   
86.
The Liverpool Continuing Health in the Community Study has followed up 1070 elderly community subjects over 6 years. In the first year 123 subjects had case-level depression. Three years later 49 (39.8%) of the previously depressed were recovered, 33 (26.8%) were depressed, 16 (13%) were not available for interview and 25 (20.3%) were dead. This study looks at factors associated with the 3-year outcome of patients who were depressed at year 0. Two outcome groups that were compared were a recovered depression group and a recurrent/persistent depression group. The factors that were significantly associated with a recurrence of depression (or persistent depression) at year 3 were bereavement of a close figure in the 6 months before interview, loneliness and life dissatisfaction at year 3. A variety of traditional risk factors for depression (including age, marital status, physical ill-health and incapacity) failed to attain significance in predicting recurrent or persistent depression. When combined, both recovered and recurrently depressed groups at year 3 had significantly higher levels of pain and a higher number of serious upsets in the past 6 months and 6 weeks compared to a compared to a control group. The depressed at year 0 were more likely to have entered more dependent forms of accommodation by year 3.  相似文献   
87.
Osteoclastoma of the calvarial bone of membranous origin is a rare entity. This paper presents a case of osteoclastoma of the occipital bone and a brief review of literature.  相似文献   
88.
Ossifying fibroma of the sellar turcica is extremely rare. There are only sporadic case reports in the literature. One such case simulating pituitary adenoma is presented in an 18-year-old girl.  相似文献   
89.
S Garg  S N Sharma 《Die Pharmazie》1992,47(12):924-926
Aerosol formulations to act as medicated aerosol dressings have been prepared with an aim of forming a protective film over the wound after spraying combining the properties of antiseptics and hemostatics. Chlorhexidine acetate along with three hemostatics namely zinc acetate, methyl cellulose and Calendula tincture were used for the formulations. The formulations were found to be satisfactory in their performance and purpose.  相似文献   
90.
A female child with post-traumatic en coup de sabre type of morphoea (fronto-parietal circumscribed scleroderma) involving the left side of the forehead and face, who developed a Coat's disease-like fundus picture over the following two years, is being reported.  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