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   9178篇
  免费   754篇
  国内免费   47篇
耳鼻咽喉   195篇
儿科学   328篇
妇产科学   156篇
基础医学   1105篇
口腔科学   168篇
临床医学   1233篇
内科学   1824篇
皮肤病学   78篇
神经病学   585篇
特种医学   336篇
外国民族医学   2篇
外科学   1221篇
综合类   209篇
一般理论   5篇
预防医学   1018篇
眼科学   278篇
药学   806篇
中国医学   8篇
肿瘤学   424篇
  2023年   54篇
  2022年   70篇
  2021年   156篇
  2020年   91篇
  2019年   179篇
  2018年   165篇
  2017年   133篇
  2016年   149篇
  2015年   176篇
  2014年   242篇
  2013年   325篇
  2012年   470篇
  2011年   464篇
  2010年   308篇
  2009年   222篇
  2008年   360篇
  2007年   411篇
  2006年   383篇
  2005年   360篇
  2004年   306篇
  2003年   310篇
  2002年   296篇
  2001年   289篇
  2000年   292篇
  1999年   260篇
  1998年   114篇
  1997年   134篇
  1996年   120篇
  1995年   109篇
  1994年   93篇
  1993年   100篇
  1992年   215篇
  1991年   255篇
  1990年   200篇
  1989年   174篇
  1988年   154篇
  1987年   156篇
  1986年   163篇
  1985年   173篇
  1984年   112篇
  1983年   98篇
  1981年   73篇
  1979年   102篇
  1978年   71篇
  1976年   78篇
  1974年   65篇
  1973年   68篇
  1972年   73篇
  1971年   62篇
  1970年   59篇
排序方式: 共有9979条查询结果,搜索用时 15 毫秒
1.
2.
Cidofovir is an acyclic nucleoside phosphonate with broad-spectrum activity against DNA viruses, including human papilloma virus (HPV). However, data on the efficacy of cidofovir in an immunosuppressive setting remain contradictory. We report for the first time on the promotion of the healing of recalcitrant warts in a patient with myelodysplastic syndrome with intravenous cidofovir treatment.  相似文献   
3.
4.
Rift Valley fever (RVF) virus infection, dissemination, and transmission rates were determined for Aedes fowleri, Aedes mcintoshi and Culex pipiens 7 or 10 days after sequentially feeding to repletion on RVF virus immune hamsters and RVF viremic hamsters, or after feeding on a mixture of RVF virus immune sheep serum and RVF viremic hamster blood through a pledget. No significant differences in infection or dissemination rates were detected among Ae. fowleri and Cx. pipiens feeding to repletion on immune hamsters before or after feeding to repletion on a viremic hamster. Similarly, no significant differences in infection, dissemination, or transmission rates were observed among Ae. fowleri and Cx. pipiens feeding to repletion on immune hamsters or nonimmune (control) hamsters 0 or 24 hr after inoculation with RVF virus. Infection rates were significantly higher for Ae. fowleri (56/66, 85%) and Cx. pipiens (123/148, 83%) fed only on viremic hamsters than for those interrupted to complete feeding on an immune hamster (Ae. fowleri [24/49, 59%], Cx. pipiens [66/131, 50%]) or a nonimmune hamster (Ae. fowleri [32/51, 63%], Cx. pipiens [69/127, 54%]). However, no significant differences were detected in infection, dissemination, or transmission rates among Ae. fowleri, Ae. mcintoshi or Cx. pipiens fed on a viremic hamster and interrupted to complete feeding on an immune vs. a nonimmune hamster. Results from interrupted feeding experiments were significantly different from pledget feeding experiments.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   
5.
6.
7.
8.
9.
Successful treatment of an infected vascular graft with gentamicin beads   总被引:1,自引:0,他引:1  
This short report describes the successful healing of an infected axillo-bifemoral graft by the insertion of Gentamicin beads, this technique cannot be recommended for all infected grafts the majority of which will have to be removed and replaced.  相似文献   
10.
In determining the role inter-study variation should play in an overview analysis, it is important to consider three factors: which question one is trying to answer; the degree of similarity or dissimilarity of design, and the degree to which heterogeneity of outcomes can be explained. Three questions one might be interested in are: whether treatment can be effective in some circumstances; whether treatment is effective on average, and whether treatment was effective on average in the trials at hand. Under the assumption of no qualitative interaction, the answers to these questions coincide. The O-E analysis most directly answers the third question. Other analyses are suggested when the first question is of interest, using the aspirin post-MI studies as an example.  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