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   3696篇
  免费   310篇
  国内免费   26篇
耳鼻咽喉   39篇
儿科学   82篇
妇产科学   92篇
基础医学   442篇
口腔科学   31篇
临床医学   469篇
内科学   633篇
皮肤病学   32篇
神经病学   509篇
特种医学   205篇
外科学   451篇
综合类   106篇
一般理论   2篇
预防医学   334篇
眼科学   33篇
药学   328篇
中国医学   4篇
肿瘤学   240篇
  2021年   44篇
  2019年   43篇
  2018年   52篇
  2017年   36篇
  2016年   39篇
  2015年   50篇
  2014年   58篇
  2013年   107篇
  2012年   135篇
  2011年   149篇
  2010年   62篇
  2009年   62篇
  2008年   132篇
  2007年   132篇
  2006年   121篇
  2005年   150篇
  2004年   114篇
  2003年   155篇
  2002年   142篇
  2001年   115篇
  2000年   122篇
  1999年   117篇
  1998年   64篇
  1997年   44篇
  1996年   37篇
  1995年   47篇
  1994年   42篇
  1993年   41篇
  1992年   85篇
  1991年   66篇
  1990年   67篇
  1989年   78篇
  1988年   91篇
  1987年   91篇
  1986年   70篇
  1985年   80篇
  1984年   61篇
  1983年   55篇
  1982年   45篇
  1981年   44篇
  1980年   40篇
  1979年   69篇
  1978年   54篇
  1974年   50篇
  1973年   62篇
  1972年   60篇
  1971年   51篇
  1970年   42篇
  1969年   40篇
  1968年   36篇
排序方式: 共有4032条查询结果,搜索用时 15 毫秒
1.
For many parents stopping life-sustaining medical treatment on their dying infant is psychologically impossible. Dostoevsky's insights into human behavior, particularly the fact that individuals do not want the anxiety and guilt associated with responsibility for making difficult decisions, might change the way physicians approach parents for permission to withdraw life-prolonging medical interventions on dying infants.  相似文献   
2.
3.
BACKGROUND: Telekid Care is a project that attempts to overcome the health and educational barriers faced by children in urban Kansas City, Kansas. Telemedicine units were placed in school nurses' offices and linked to physicians at the University of Kansas Medical Center (KUMC). This paper describes the development of this project, presents utilization data, and discuss the lessons learned from the application of telemedicine in a school setting. RESULTS: Project developers spent 11 months designing the protocol and procedures for a pilot test. Four elementary schools participated, and 187 consultations were conducted. The most common reason for consultation was ear, nose, and throat (ENT) problems, making up 28% of all consults. Mandatory school physical examinations and dermatology problems combined to make up an additional 40% of the consults. The average time that elapsed between the request for a consult and confirmation of an appointment was 23 minutes. When immediate service was requested, 85% of the consults occurred the day of the request. These results strongly demonstrate telemedicine's ability to offer immediate service to children in need. CONCLUSION: Telemedicine enabled underserved inner-city children to gain access to health services. This service was most effective when it was integrated into the delivery system. Furthermore, community groups strongly favored the project, positively influencing its acceptance as an innovative health care delivery system.  相似文献   
4.
5.
6.
7.
Day surgery is expanding in the UK. It offers benefits for both the patient and the NHS. If this initial momentum is to be maintained it is vital that patients are carefully selected and prepared for day case procedures. Failure to do so will result in falling standards and loss of support from both clinicians and patients.  相似文献   
8.
9.
Plastic implants (2.7 mm maximum dimension) of an ethyl vinyl acetate copolymer (EVAc) matrix, containing inulin, bovine serum albumin (BSA) and luteinizing hormone releasing hormone (LHRH), were covered with impervious EVAc and then surgically placed into the peritoneal cavity of 1-year-old channel catfish, Ictalurus punctatus. In fish kept in cold water (13 degrees C), 10 per cent of the implants per month were encapsulated by granulation tissue. In fish kept in warm water (27 degrees C), 20 per cent of the implants per month were encapsulated, with a total of 86 per cent encapsulated at 5 months. In addition to fibroblasts and capillaries, the granulation tissue included macrophages, neutrophils, lymphocytes, plasma cells, multinucleated giant cells and a matrix of collagen fibres. The density of the fibrous capsule increased with time. In a separate investigation, it was found that the thickness of the capsule was directly proportional to the degree of exposure of the EVAc matrix to the fish (exposure influenced by the rate of dissolution of the capsule content). Monstrous giant cells with up to 600 nuclei per 5 microns thick section were seen in capsules around implants. On intraperitoneally implanted cover glasses, whole giant cells contained up to 6000 nuclei and were interconnected by cytoplasmic bridges. Signs of neoplasia, implant expulsion or massive adhesions were not seen.  相似文献   
10.
Twenty adolescent male sexual offenders were evaluated by penile plethysmography on two separate occasions. Stimuli consisted of 19, two-minute audiotaped cues. Test-retest reliability was demonstrated for 15 of the 19 audiotaped vignettes. The highest correlations were found for those sexual behaviors in which the adolescents had engaged.  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