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   3901篇
  免费   255篇
  国内免费   41篇
耳鼻咽喉   16篇
儿科学   119篇
妇产科学   126篇
基础医学   470篇
口腔科学   58篇
临床医学   786篇
内科学   575篇
皮肤病学   34篇
神经病学   329篇
特种医学   136篇
外科学   323篇
综合类   76篇
一般理论   9篇
预防医学   562篇
眼科学   35篇
药学   215篇
中国医学   3篇
肿瘤学   325篇
  2023年   24篇
  2022年   31篇
  2021年   68篇
  2020年   51篇
  2019年   68篇
  2018年   88篇
  2017年   80篇
  2016年   95篇
  2015年   85篇
  2014年   100篇
  2013年   179篇
  2012年   264篇
  2011年   281篇
  2010年   162篇
  2009年   158篇
  2008年   289篇
  2007年   271篇
  2006年   259篇
  2005年   218篇
  2004年   218篇
  2003年   209篇
  2002年   180篇
  2001年   50篇
  2000年   33篇
  1999年   54篇
  1998年   72篇
  1997年   45篇
  1996年   50篇
  1995年   43篇
  1994年   51篇
  1993年   52篇
  1992年   25篇
  1991年   17篇
  1990年   21篇
  1989年   27篇
  1988年   28篇
  1987年   17篇
  1986年   15篇
  1985年   28篇
  1984年   22篇
  1983年   21篇
  1982年   16篇
  1981年   23篇
  1980年   23篇
  1977年   5篇
  1976年   12篇
  1975年   8篇
  1974年   11篇
  1971年   7篇
  1963年   4篇
排序方式: 共有4197条查询结果,搜索用时 15 毫秒
1.
This study examined the impact of childhood traumatic brain injury (TBI) on self-regulation and social and behavioral functioning, and the role of self-regulation as a predictor of children's social and behavioral functioning. Participants included 65 children with moderate to severe TBI and 65 children without TBI, all between 6 and 11 years of age. Self-regulation and social and behavioral functioning were assessed 2 to 5 years following injury. Children with TBI displayed deficits in self-regulation and social and behavioral functioning, after controlling for socioeconomic status (SES), although the magnitude of the deficits was not related to injury severity. Self-regulation accounted for significant variance in children's social and behavioral functioning, after controlling for SES and group membership. Self-regulation may be an important determinant of children's social and behavioral functioning following TBI.  相似文献   
2.
3.
This paper describes an innovative approach to preparing high school students with mild disabilities for challenging careers in high tech industries, called High School High Tech (HSHT). Iowa's HSHT Goes to College program has three central elements, each of which is discussed in this paper: High School Preparation—assisting students in identifying a suitable high tech career goal; Higher Education Preparation and Supports—assisting students in selecting college/training programs that match their career goal, and in successfully completing their postsecondary programs; Workforce Entry Assistance—linking students with employers and launching their high tech careers. The paper concludes with a presentation of outcomes to date and recommendations for program enhancements. The information presented here is intended to assist education and rehabilitation professionals interested in establishing similar efforts across the nation.  相似文献   
4.
5.
6.
The identification of clinically relevant, active immunomodulatory agents is important for developing immunotherapeutic approaches to chronic lymphocytic leukemia (CLL) and other B-cell lymphomas that are not curable with conventional chemotherapy. In this investigation, the imidazoquinoline Toll-like receptor (TLR)-7/8 agonist, imiquimod, was found to mediate the clearance of a lymphomatous skin lesion in a CLL patient. Imidazoquinolines also activated TLR-7/8 signaling pathways, resulting in increased expression of costimulatory molecules on circulating tumor cells. These observations extend the therapeutic spectrum of imiquimod to cutaneous B-cell lymphomas and suggest the use of TLR-7/8 agonists in CLL immunotherapy.  相似文献   
7.
8.
Suppurative corneal ulceration in Bangladesh   总被引:8,自引:0,他引:8  
Suppurative keratitis is an important preventable cause of blindness, particularly in the developing world. This study analyses 142 cases of suppurative keratitis referred to Chittagong Eye Infirmary, Bangladesh. Some 53.5% of cases were bacterial and 35.9% were fungal. The five most common pathogens were: Pseudomonas sp. 24%, Streptococcus pneumoniae 17%, Aspergillus sp. 13%, Fusarium sp. 7% and Curvularia sp. 6%. Gram stain and culture results were consistent in 62.6% of cases. Previous antibiotic treatment was a significant factor for failure of culture isolation and less so for Gram stain failure. On Gram stain, 55.9% of pseudomonal cases were missed, but only 2% of fungal cases were missed. Over all, Gram stain had a sensitivity of 62% and positive predictive value of 84% for bacterial cases, and 98% and 94% for fungal cases, respectively. Fungal ulcers were typically filamentous, but an antecedent history of trauma was not common. The most frequent injury was due to rice grains, but the inoculum appeared to be introduced during eye washing with contaminated water. Pseudomonal ulcers occurred most frequently in the monsoon season, and Fusarium cases were seen only in the hot, dry season.  相似文献   
9.
10.
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