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   20578篇
  免费   1704篇
  国内免费   39篇
耳鼻咽喉   158篇
儿科学   799篇
妇产科学   580篇
基础医学   2711篇
口腔科学   300篇
临床医学   2359篇
内科学   3771篇
皮肤病学   332篇
神经病学   2287篇
特种医学   370篇
外国民族医学   5篇
外科学   2276篇
综合类   194篇
一般理论   67篇
预防医学   2993篇
眼科学   313篇
药学   1353篇
  1篇
中国医学   39篇
肿瘤学   1413篇
  2024年   46篇
  2023年   287篇
  2022年   497篇
  2021年   941篇
  2020年   570篇
  2019年   782篇
  2018年   896篇
  2017年   634篇
  2016年   647篇
  2015年   732篇
  2014年   949篇
  2013年   1211篇
  2012年   1680篇
  2011年   1726篇
  2010年   873篇
  2009年   705篇
  2008年   1212篇
  2007年   1302篇
  2006年   1078篇
  2005年   1009篇
  2004年   910篇
  2003年   818篇
  2002年   633篇
  2001年   153篇
  2000年   150篇
  1999年   145篇
  1998年   149篇
  1997年   109篇
  1996年   73篇
  1995年   80篇
  1994年   63篇
  1993年   69篇
  1992年   68篇
  1991年   76篇
  1990年   58篇
  1989年   76篇
  1988年   61篇
  1987年   50篇
  1986年   52篇
  1985年   51篇
  1984年   52篇
  1983年   40篇
  1982年   36篇
  1981年   65篇
  1980年   50篇
  1979年   53篇
  1978年   47篇
  1977年   41篇
  1976年   40篇
  1974年   47篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
Objective: The study explored the semantic content and origins of negative self-beliefs, and their functional links to “not eating enough” and other behaviors, in participants with anorexia nervosa (AN). Method: Fifteen women meeting DSM-IV criteria for AN were compared with 17 dieting and 18 non-dieting women matched on age and number of years of education. The main outcome measure was a semi-structured interview. Results: Six themes were identified in the beliefs of participants with AN. These were, in order of decreasing frequency, powerlessness (present in all but three AN participants), failure, defectiveness, unattractiveness, worthlessness and emptiness. Importantly, powerlessness and failure beliefs were consistently present independent of Beck Depression Inventory-II scores. The negative early life experiences associated with these beliefs had high distress and responsibility ratings. Participants with AN reported that they employed specific behaviors, particularly ‘not eating enough,’ and ‘placating others,’ to try to reduce the cognitive and emotional impact of their negative self-beliefs. Discussion: The findings are discussed in relation to the role of powerlessness and the function of “not eating enough” in cognitive theory and therapy for AN.
  相似文献   
14.
Though human pain has existed since the dawn of time, formal medical pain relief in the form of anesthesia and analgesia has been available only since the mid-nineteenth century. Even after these measures became available, they were used very selectively for the first 100 years of their existence. The youngest patients, especially, were denied pain relief, probably because they could not complain about their pain as articulately and as effectively as adult patients could. A desperate need existed for health care professionals to recognize and appreciate the fact that their youngest patients could suffer immensely and to adequately address the issue. This article reviews the evolution of knowledge and attitudes regarding young patients' pain and addresses why and how this process occurred. The evolution of knowledge was traced by reviewing the literature found in MEDLINE, CINAHL, and LEXIS-NEXIS searches and through hand searches of articles that were frequently cited. Physiologic, pharmacologic, ethical, and psychologic aspects of young patients' pain are addressed. A unique phenomenon arose from the data reviewed. The process of belief and changes in practice were encouraged not only by advances in science, but also by consumer demand. Advances in the past decade in the management of young patients' pain were profound, but are still not complete. Understanding the evolution surrounding pain recognition in young patients provides a stepping stone that can facilitate further improvements in the management of pain in young patients.  相似文献   
15.
16.
17.
Although there are well-established clinical human milk banks in the United States, there are no milk banks specifically intended to foster research on human milk. The authors' goal was to establish a milk bank with a core data set to support exploratory and hypothesis-driven studies on human milk. Donations to the Cincinnati Children's Research Human Milk Bank are accepted within the context of ongoing, hypothesis-driven research or on an ad hoc basis. Donors must give informed consent, and scientists wishing to use the samples must have Institutional review board approval for their use. Development of more research human milk banks can potentially provide resources for multidisciplinary collaboration and advance the study of human milk and lactation.  相似文献   
18.
19.
20.
Emphysematous pyelonephritis is a severe life-threatening infection which continues to carry significant morbidity and mortality. We present a case recently managed at our institution by laparoscopic nephrectomy. The patient survived, and in comparison to some of the more conventionally managed patients in the literature, made an extremely speedy recovery. We would advocate this option to be seriously considered when patients are suitable and appropriately trained surgeons are available.  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