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   204393篇
  免费   4570篇
  国内免费   485篇
耳鼻咽喉   2828篇
儿科学   7863篇
妇产科学   6118篇
基础医学   26653篇
口腔科学   5927篇
临床医学   16298篇
内科学   37044篇
皮肤病学   4705篇
神经病学   12627篇
特种医学   10882篇
外国民族医学   97篇
外科学   29999篇
综合类   1155篇
一般理论   11篇
预防医学   17136篇
眼科学   4468篇
药学   14203篇
  2篇
中国医学   189篇
肿瘤学   11243篇
  2018年   3798篇
  2017年   4065篇
  2016年   3385篇
  2015年   5133篇
  2014年   4649篇
  2013年   3928篇
  2012年   10603篇
  2011年   5545篇
  2010年   2611篇
  2009年   4233篇
  2008年   2681篇
  2007年   3460篇
  2006年   3667篇
  2005年   11748篇
  2004年   13171篇
  2003年   8745篇
  2002年   3913篇
  2001年   4377篇
  2000年   1728篇
  1999年   5907篇
  1998年   617篇
  1995年   443篇
  1992年   6901篇
  1991年   7129篇
  1990年   7371篇
  1989年   6963篇
  1988年   6497篇
  1987年   6247篇
  1986年   5978篇
  1985年   5266篇
  1984年   3620篇
  1983年   2950篇
  1982年   1040篇
  1981年   806篇
  1980年   868篇
  1979年   3851篇
  1978年   2383篇
  1977年   1793篇
  1976年   1570篇
  1975年   2495篇
  1974年   3115篇
  1973年   2744篇
  1972年   2767篇
  1971年   2746篇
  1970年   2560篇
  1969年   2465篇
  1968年   2238篇
  1967年   2166篇
  1966年   1900篇
  1965年   1133篇
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
1.
2.
3.
4.
Depigmented lesions may occur as postinflammatory sequelae of subacute cutaneous lupus erythematosus (SCLE), leading to great psychosocial impact. A 53‐year‐old male patient presented with post‐SCLE depigmented facial lesions after five years of disease stability. We proposed surgical treatment with melanocyte‐keratinocyte transplantation procedure (MKTP), and after five months the patient achieved 90% repigmentation, without Koebner phenomenon (KP). In theory, KP is a possible complication of MKTP procedure since the preparation of the receptor area involves the use of dermabrasion. In an attempt to avoid it, we suggest to maintain the treatment of the underlying disease and wait for a minimum period of disease stability before the procedure.  相似文献   
5.
Henoch‐Schonlein purpura (HSP) is the most common systemic vasculitis in childhood. There is no consensus about the management for isolated cutaneous manifestations in HSP. We describe a case of HSP presenting with severe skin lesions that did not respond to standard therapy with corticosteroids. The 11‐year‐old child was treated with intravenous immunoglobulins, which induced rapid and persistent resolution of symptomatology.  相似文献   
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