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   7034篇
  免费   394篇
  国内免费   65篇
耳鼻咽喉   51篇
儿科学   206篇
妇产科学   162篇
基础医学   722篇
口腔科学   151篇
临床医学   488篇
内科学   1815篇
皮肤病学   156篇
神经病学   499篇
特种医学   397篇
外科学   1237篇
综合类   22篇
预防医学   253篇
眼科学   60篇
药学   355篇
中国医学   18篇
肿瘤学   901篇
  2024年   7篇
  2023年   90篇
  2022年   134篇
  2021年   270篇
  2020年   168篇
  2019年   240篇
  2018年   300篇
  2017年   191篇
  2016年   221篇
  2015年   218篇
  2014年   336篇
  2013年   398篇
  2012年   546篇
  2011年   565篇
  2010年   303篇
  2009年   271篇
  2008年   439篇
  2007年   428篇
  2006年   372篇
  2005年   433篇
  2004年   356篇
  2003年   322篇
  2002年   275篇
  2001年   52篇
  2000年   37篇
  1999年   49篇
  1998年   70篇
  1997年   49篇
  1996年   40篇
  1995年   33篇
  1994年   33篇
  1993年   24篇
  1992年   19篇
  1991年   24篇
  1990年   22篇
  1989年   20篇
  1988年   24篇
  1987年   12篇
  1986年   16篇
  1985年   10篇
  1984年   13篇
  1983年   4篇
  1982年   6篇
  1981年   5篇
  1980年   7篇
  1979年   5篇
  1977年   5篇
  1973年   3篇
  1971年   5篇
  1970年   3篇
排序方式: 共有7493条查询结果,搜索用时 15 毫秒
1.
2.
Graefe's Archive for Clinical and Experimental Ophthalmology - To estimate the impact of delayed care during the coronavirus disease 2019 (COVID-19) pandemic on the outcomes of patients with...  相似文献   
3.
4.
5.
6.
7.
8.
9.
OBJECTIVE: The study aims to verify whether phonologic and rapid automatized naming (RAN) deficits are present and associated in Italian dyslexic children and whether they differentially affect dyslexics with and without a history of previous language delay (LD). BACKGROUND: According to the phonologic core deficit hypothesis, dyslexia may stem from impairment of the representation and manipulation of phonemes and may be closely associated with oral language deficits. However, deficits in tasks not requiring fine-grained phonologic representations, such as RAN, have also been described in dyslexic children. METHODS: Thirty-seven children were selected on the basis of a reading deficit and were assigned to 2 groups according to whether or not they had a history of early LD as determined retrospectively by parental report. A battery of reading and writing, verbal working memory, metaphonologic, RAN, and visual search tests were administered. RESULTS: RAN deficits were shared by most dyslexics (with and without a history of LD), whereas phonologic deficits were mainly associated with a previous LD. This last condition did not result in a more profound impairment of reading and writing decoding skills. CONCLUSION: In a shallow orthography such as Italian, RAN, not phonologic deficits, may represent the main cognitive marker of developmental dyslexia.  相似文献   
10.
Pulmonary infection complicating intra-abdominal sepsis is a major clinical problem. An experimental model for intra-abdominal sepsis was created with implantation of gelatin capsules, containing 3 x 10(8) cfu E. coli strain no. 2554, in the peritoneal cavity of 20 rats (10 animals received and 10 did not receive antibiotic therapy with ceftriaxone) in order to verify the role of the primary site of infection in the pathogenesis of pneumonia. Ten rats were sacrificed to determine the relative pulmonary weight and 10 were submitted to simple laparotomy and insertion of a germ-free capsule (sham-operated group). In this group of animals there was only one death (10%). All the rats that received antibiotic therapy survived until sacrifice while all the rats that did not receive ceftriaxone died, 7 within the 2nd and 3 on the 6th postoperative day. Pneumonia and peritonitis developed only in the animals that did not receive ceftriaxone. Bacteriological findings of material obtained from peritoneal and pleural cavities revealed the same strain of E. coli used for the experiment, suggesting that bacteria involved in the pleuro-pulmonary infections may originate in the primary site of infection and that antibiotic therapy started at the moment of contamination, can prevent this major complication.  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