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   2154903篇
  免费   148927篇
  国内免费   4504篇
耳鼻咽喉   28800篇
儿科学   70785篇
妇产科学   60377篇
基础医学   315015篇
口腔科学   58846篇
临床医学   188969篇
内科学   420032篇
皮肤病学   50782篇
神经病学   170447篇
特种医学   82502篇
外国民族医学   690篇
外科学   318304篇
综合类   41258篇
现状与发展   3篇
一般理论   629篇
预防医学   171747篇
眼科学   48814篇
药学   155672篇
  3篇
中国医学   4778篇
肿瘤学   119881篇
  2019年   17416篇
  2018年   28881篇
  2017年   22369篇
  2016年   23709篇
  2015年   27236篇
  2014年   34708篇
  2013年   50280篇
  2012年   75715篇
  2011年   75425篇
  2010年   42517篇
  2009年   40546篇
  2008年   67311篇
  2007年   72081篇
  2006年   72075篇
  2005年   76983篇
  2004年   75437篇
  2003年   68325篇
  2002年   62083篇
  2001年   96879篇
  2000年   97723篇
  1999年   83734篇
  1998年   22249篇
  1997年   19764篇
  1996年   20095篇
  1995年   19027篇
  1994年   17359篇
  1993年   16309篇
  1992年   64868篇
  1991年   63276篇
  1990年   61749篇
  1989年   59031篇
  1988年   54436篇
  1987年   53299篇
  1986年   49962篇
  1985年   47397篇
  1984年   35663篇
  1983年   30001篇
  1982年   17234篇
  1979年   32600篇
  1978年   22985篇
  1977年   19090篇
  1976年   17950篇
  1975年   19889篇
  1974年   24078篇
  1973年   22843篇
  1972年   21724篇
  1971年   20381篇
  1970年   19085篇
  1969年   18081篇
  1968年   17026篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
Attachment is a behavioral and physiological system, which enables individual’s dynamic adaptation to its environment. Attachment develops in close interaction between an infant and his/her mother, plays an important role in the development of the infant’s brain, and influences the quality of interpersonal relationships throughout life.Security of attachment is believed to influence individual response to stress, exposing insecurely organized individuals to deregulated autonomic nervous system and exaggerated hypothalamic-pituitary-adrenal activity, which, in turn, produces increased and prolonged exposure to stress-hormones. Such stress responses may have considerable implications for the development of diverse health-risk conditions, such as insulin resistance and hyperlipidemia, shown by numerous studies.Although the mechanisms are not yet fully understood, there is compelling evidence highlighting the role of psychological stress in the development of type 1 diabetes (T1D). One of the possible contributing factors for the development of T1D may be the influence of attachment security on individual stress reactivity. Thus, the suggestion is that insecurely attached individuals are more prone to experience increased and prolonged influence of stress hormones and other mechanisms causing pancreatic beta-cell destruction.The present paper opens with a short overview of the field of attachment in children, the principal attachment classifications and their historic development, describes the influence of attachment security on individual stress-reactivity and the role of the latter in the development of T1D. Following is a review of recent literature on the attachment in patients with T1D with a conclusion of a proposed role of attachment organization in the etiology of T1D.  相似文献   
82.
83.
84.
85.
Background. Haemophagocytic lymphohistiocytosis (HLH) is a rare clinical syndrome characterized by fever, hepatosplenomegaly, cytopenia, and progressive multiple-organ failure. HLH in adults is often secondary to autoimmune diseases, cancer, or infections in contrast to familial HLH. Treatment of secondary HLH is directed against the triggering disease in addition to immunosuppressive therapy, the latter commonly according to the HLH-2004 protocol.Methods. We conducted a retrospective study to identify triggering diseases, disease-specific and immunosuppressive therapy administered, and prognosis in adult patients with secondary HLH. Patient data were collected from October 2010 to January 2015.Results. Ten adult patients with secondary HLH were identified. Seven were men, and the median age at diagnosis was 62 years. Five cases were triggered by malignant disease and five by infection. The median patient fulfilled five of the eight HLH-2004 diagnostic criteria. All patients fulfilled the criteria fever, cytopenia, and ferritin >500 µg/L. Median time from hospital admission to HLH diagnosis was 20 days. Four patients received immunosuppressive therapy according to the HLH-2004 protocol. The prognosis was dismal, especially for the patients with malignancy-associated HLH, of whom all died.Conclusion. HLH should be suspected in patients who present with fever, cytopenia, and ferritin >500 µg/L. Secondary HLH has a dismal prognosis. None of the patients with HLH triggered by malignancy survived. Achieving remission of the triggering disease seems to be important for a favourable outcome as, in all surviving patients, the haemophagocytic syndrome resolved after remission of the underlying infection.  相似文献   
86.
ABSTRACT

Communication between health professionals and patients is an intergroup phenomenon where the health professional has the most power and status. Over the past few decades, there has been a steady increase in the availability to patients of information about healthcare and specific diseases on the Internet. In this paper, we ask whether the use of Internet health information assists patients to manage their consultations with health professionals better and whether it alters the intergroup dynamic by providing a more equal status for patients. In this study 370 participants from Australia and Canada completed a survey that included a ‘willingness to communicate with health professionals’ scale. They also commented on their use and trust of Internet health information. Thematic analysis suggests that patients’ use of Internet health information serves as a broker between patients and their health provider in health consultations. We discuss the implications of these findings for health practitioners as they address how easier Internet access influences patient interactions with health professionals. We consider future research directions these finding provide in explaining communication behaviour in this context.  相似文献   
87.
Graefe's Archive for Clinical and Experimental Ophthalmology -  相似文献   
88.
89.
90.
Annals of Nuclear Medicine - Cardiac amyloidosis is a rare disease characterized by amyloid heart deposits and is usually a part of systemic amyloidosis, in relation to systemic light chain (AL)...  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