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   214851篇
  免费   5462篇
  国内免费   516篇
耳鼻咽喉   2890篇
儿科学   7918篇
妇产科学   6302篇
基础医学   28141篇
口腔科学   5962篇
临床医学   17430篇
内科学   39506篇
皮肤病学   4872篇
神经病学   13504篇
特种医学   11337篇
外国民族医学   97篇
外科学   32325篇
综合类   1142篇
一般理论   16篇
预防医学   17645篇
眼科学   4655篇
药学   14917篇
  2篇
中国医学   212篇
肿瘤学   11956篇
  2019年   552篇
  2018年   4102篇
  2017年   4278篇
  2016年   3547篇
  2015年   5191篇
  2014年   4809篇
  2013年   4211篇
  2012年   11210篇
  2011年   6404篇
  2010年   3039篇
  2009年   4533篇
  2008年   3497篇
  2007年   4374篇
  2006年   4504篇
  2005年   12674篇
  2004年   14102篇
  2003年   9633篇
  2002年   4797篇
  2001年   4535篇
  2000年   1866篇
  1999年   5999篇
  1998年   749篇
  1992年   6959篇
  1991年   7178篇
  1990年   7410篇
  1989年   6998篇
  1988年   6526篇
  1987年   6283篇
  1986年   6009篇
  1985年   5279篇
  1984年   3655篇
  1983年   2961篇
  1982年   1051篇
  1981年   810篇
  1980年   883篇
  1979年   3863篇
  1978年   2387篇
  1977年   1806篇
  1976年   1585篇
  1975年   2486篇
  1974年   3127篇
  1973年   2763篇
  1972年   2777篇
  1971年   2750篇
  1970年   2569篇
  1969年   2474篇
  1968年   2253篇
  1967年   2167篇
  1966年   1903篇
  1965年   1136篇
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
1.
2.
3.
4.
European Radiology - The strongest adverse prognostic factor in myxoid/round cell liposarcomas (MRC-LPS) is the presence of a round cell component above 5% within the tumor bulk. Its identification...  相似文献   
5.
Recent years have brought an enhanced understanding of keratinocyte contribution to cutaneous nociception. While intra‐epidermal nerve endings were classically considered as the exclusive transducers of cutaneous noxious stimuli, it has now been demonstrated that epidermal keratinocytes can initiate nociceptive responses, like Merkel cells do for the innocuous mechanotransduction. In the light of recent in vivo findings, this article outlines this paradigm shift that points to a not yet considered population of sensory epidermal cells.  相似文献   
6.
7.

Objective

The “Centre Hospitalier Francois Dunan” is located on an isolated island and ensures patients care in hemodialysis thanks to telemedicine support. Many research studies have demonstrated the importance of hemodialysis fluids composition to reduce morbidity in patients on chronic hemodialysis. The aim of this study was to identify the risks inherent in the production of dialysis fluids in a particular context, in order to set up an improvement action plan to improve risk control on the production of dialysis fluids.

Methods

The risk analysis was conducted with the FMECA methodology (Failure Mode, Effects and Criticality Analysis) by a multi professional work group. Three types of risk have been reviewed: technical risks that may impact the production of hemodialysis fluids, health risks linked with chemical composition and health risks due to microbiological contamination of hemodialysis fluids.

Results

The work group, in close cooperation with the expert staff of the dialysis center providing telemedicine assistance, has developed an action plan in order to improve the control of the main risks brought to light by the risk analysis.

Conclusion

The exhaustive analysis of the risks and their prioritisation have permitted to establish a relevant action plan in this improving quality of dialysis fluids approach. The risk control of dialysis fluids is necessary for the security of dialysis sessions for patients, even more when these sessions are realized by telemedicine in Saint-Pierre-et-Miquelon.  相似文献   
8.
9.
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   
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