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   1125146篇
  免费   72256篇
  国内免费   1838篇
耳鼻咽喉   15736篇
儿科学   31812篇
妇产科学   29187篇
基础医学   158227篇
口腔科学   34204篇
临床医学   96119篇
内科学   218343篇
皮肤病学   23818篇
神经病学   84627篇
特种医学   47088篇
外国民族医学   176篇
外科学   180456篇
综合类   19167篇
现状与发展   1篇
一般理论   244篇
预防医学   78150篇
眼科学   25645篇
药学   86132篇
  5篇
中国医学   2357篇
肿瘤学   67746篇
  2018年   13014篇
  2017年   11283篇
  2016年   11327篇
  2015年   13899篇
  2014年   16646篇
  2013年   21693篇
  2012年   34671篇
  2011年   30905篇
  2010年   17636篇
  2009年   18496篇
  2008年   27823篇
  2007年   29664篇
  2006年   30557篇
  2005年   37290篇
  2004年   37748篇
  2003年   32605篇
  2002年   27484篇
  2001年   58437篇
  2000年   58330篇
  1999年   51852篇
  1998年   11333篇
  1997年   9815篇
  1996年   9995篇
  1995年   9347篇
  1994年   8653篇
  1993年   7890篇
  1992年   41175篇
  1991年   39891篇
  1990年   38925篇
  1989年   37779篇
  1988年   34525篇
  1987年   33529篇
  1986年   31390篇
  1985年   29703篇
  1984年   20925篇
  1983年   17667篇
  1982年   8698篇
  1979年   19184篇
  1978年   12723篇
  1977年   10676篇
  1976年   9283篇
  1975年   10905篇
  1974年   13328篇
  1973年   12400篇
  1972年   11904篇
  1971年   11400篇
  1970年   10794篇
  1969年   10201篇
  1968年   9284篇
  1967年   8531篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
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   
62.
63.
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   
64.
65.
66.
67.
68.
69.
70.
Respiratory cysts are benign lesions lined by normal respiratory epithelium. There are few reported cases localized to the orbit, while those of the eyelid are exceedingly rare. Respiratory cysts usually arise either from a non‐hereditary congenital malformation, where they are distinguished as choristomatous, or from trauma. Here, we report a case of a 53‐year‐old man who presented with a large right lower eyelid cyst that was histopathologically diagnosed as a respiratory cyst.  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