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   209919篇
  免费   5043篇
  国内免费   519篇
耳鼻咽喉   2907篇
儿科学   7625篇
妇产科学   6008篇
基础医学   27291篇
口腔科学   6349篇
临床医学   16612篇
内科学   38162篇
皮肤病学   4968篇
神经病学   13330篇
特种医学   11661篇
外国民族医学   97篇
外科学   31760篇
综合类   1160篇
一般理论   7篇
预防医学   16969篇
眼科学   4622篇
药学   14298篇
  2篇
中国医学   190篇
肿瘤学   11463篇
  2021年   600篇
  2018年   3943篇
  2017年   4213篇
  2016年   3663篇
  2015年   5385篇
  2014年   4946篇
  2013年   4210篇
  2012年   11088篇
  2011年   5928篇
  2010年   2965篇
  2009年   4491篇
  2008年   3168篇
  2007年   3973篇
  2006年   4137篇
  2005年   12137篇
  2004年   13520篇
  2003年   9011篇
  2002年   4157篇
  2001年   4468篇
  2000年   1763篇
  1999年   5965篇
  1998年   651篇
  1992年   6895篇
  1991年   7110篇
  1990年   7356篇
  1989年   6958篇
  1988年   6488篇
  1987年   6240篇
  1986年   5952篇
  1985年   5243篇
  1984年   3596篇
  1983年   2914篇
  1982年   1015篇
  1981年   772篇
  1980年   844篇
  1979年   3831篇
  1978年   2365篇
  1977年   1790篇
  1976年   1565篇
  1975年   2477篇
  1974年   3112篇
  1973年   2749篇
  1972年   2759篇
  1971年   2746篇
  1970年   2560篇
  1969年   2467篇
  1968年   2239篇
  1967年   2163篇
  1966年   1902篇
  1965年   1132篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Graefe's Archive for Clinical and Experimental Ophthalmology - The published online version contains mistake as the author's first name and last name have been interchanged as "Hild...  相似文献   
4.
5.
6.
7.
8.
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   
9.
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   
10.
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