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   2283572篇
  免费   150260篇
  国内免费   4373篇
耳鼻咽喉   33391篇
儿科学   72979篇
妇产科学   64437篇
基础医学   320972篇
口腔科学   67048篇
临床医学   198517篇
内科学   433261篇
皮肤病学   51819篇
神经病学   176254篇
特种医学   92050篇
外国民族医学   669篇
外科学   347755篇
综合类   49462篇
现状与发展   7篇
一般理论   678篇
预防医学   165673篇
眼科学   54529篇
药学   174709篇
  12篇
中国医学   5169篇
肿瘤学   128814篇
  2018年   23769篇
  2017年   19885篇
  2016年   21276篇
  2015年   24782篇
  2014年   32297篇
  2013年   45819篇
  2012年   65343篇
  2011年   64616篇
  2010年   37758篇
  2009年   37412篇
  2008年   58992篇
  2007年   64387篇
  2006年   65382篇
  2005年   69913篇
  2004年   69297篇
  2003年   63191篇
  2002年   57571篇
  2001年   106743篇
  2000年   108170篇
  1999年   93234篇
  1998年   24407篇
  1997年   21791篇
  1996年   21349篇
  1995年   20057篇
  1994年   18617篇
  1992年   73261篇
  1991年   71190篇
  1990年   70205篇
  1989年   68131篇
  1988年   62814篇
  1987年   61580篇
  1986年   58761篇
  1985年   55478篇
  1984年   41086篇
  1983年   34823篇
  1982年   19886篇
  1981年   17864篇
  1979年   39064篇
  1978年   27252篇
  1977年   23728篇
  1976年   21347篇
  1975年   24644篇
  1974年   29337篇
  1973年   28408篇
  1972年   27119篇
  1971年   25628篇
  1970年   24034篇
  1969年   23126篇
  1968年   21340篇
  1967年   19256篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
65.
66.
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   
67.
68.
69.
70.
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   
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