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   497354篇
  免费   91278篇
  国内免费   22840篇
耳鼻咽喉   6070篇
儿科学   9902篇
妇产科学   6579篇
基础医学   60285篇
口腔科学   15253篇
临床医学   76602篇
内科学   89481篇
皮肤病学   13626篇
神经病学   38135篇
特种医学   17218篇
外国民族医学   162篇
外科学   62460篇
综合类   58431篇
现状与发展   111篇
一般理论   57篇
预防医学   39742篇
眼科学   11580篇
药学   43981篇
  332篇
中国医学   21490篇
肿瘤学   39975篇
  2024年   2084篇
  2023年   10219篇
  2022年   15267篇
  2021年   21498篇
  2020年   22929篇
  2019年   22919篇
  2018年   25980篇
  2017年   26885篇
  2016年   27090篇
  2015年   32361篇
  2014年   38223篇
  2013年   39706篇
  2012年   32827篇
  2011年   34627篇
  2010年   32692篇
  2009年   27887篇
  2008年   23633篇
  2007年   21271篇
  2006年   21311篇
  2005年   18598篇
  2004年   13102篇
  2003年   12010篇
  2002年   10413篇
  2001年   9888篇
  2000年   8824篇
  1999年   8639篇
  1998年   6081篇
  1997年   6102篇
  1996年   5059篇
  1995年   4676篇
  1994年   3735篇
  1993年   2595篇
  1992年   2987篇
  1991年   2648篇
  1990年   2216篇
  1989年   2087篇
  1988年   1923篇
  1987年   1559篇
  1986年   1333篇
  1985年   1095篇
  1984年   813篇
  1983年   750篇
  1982年   584篇
  1981年   551篇
  1980年   389篇
  1979年   369篇
  1978年   374篇
  1977年   381篇
  1976年   319篇
  1974年   274篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
中风毒邪论是一种与传统中医中风病理有所不同的理论 ,在中风毒邪论指导下形成解毒通络方是较为理想的神经保护剂 ,可解决目前神经保护治疗的主要障碍 ,有望成为提高中医治疗中风急性期疗效的关键  相似文献   
102.
Abstract – Traumatic dental injuries often occur to the teeth and their supporting tissues and they are the main reasons for emergency visit to a dental clinic. Management of a fracture depends on its position and the extent of root involvement. Horizontal root fractures are not seen frequently and the treatment consists of reduction and long‐term rigid fixation of the coronal segment. The present case demonstrates the successful management of two horizontally fractured maxillary central incisors with a follow‐up period of 9 months.  相似文献   
103.
104.
105.
PROBLEM: Recent developments in providing care to children with emotional and behavioral disorders, especially those with serious emotional disturbance, have included the establishment of systems of care. Guided by a set of principles and values, these systems of care have organized and delivered services to children and families with complex needs. To date, nurses have not had a salient role in systems of care. RESULTS: It is estimated that 20% of American children and adolescents have an emotional or mental disorder. As many as two thirds of these children are not receiving services. Systems of care have been funded to provide services for these children, particularly for the most severely affected. To date, nursing has not had a prominent role in these systems of care. CONCLUSIONS: Based on their knowledge, skills, and holistic approach to care, nurses could better integrate nursing care into systems of care. Possible roles as case managers, primary therapists, in-home interventionists, and in educational programs are suggested.  相似文献   
106.
107.
目的建立滑膜炎颗粒剂中原儿茶醛的含量测定方法质量。方法采用高效液相色谱法对方中原儿茶醛进行含量测定。结果高效液相色谱法测定结果表明原儿茶醛在0.1005~1.005μg范围内呈线性关系,平均加样回收率为99.22%;RSD为0.72%。结论本法简便,重现性好、结果可靠,可作为控制滑膜炎颗粒剂的质量方法。  相似文献   
108.
Recent New Labour policy for the ‘modernisation’ of Government places a good deal of emphasis on decentralisation. This emphasis is particularly marked in relation to the organisation of primary care. However, like hospitals and other National Health Service institutions, primary care trusts (PCTs) are subject to a substantial raft of centrally established performance targets and indicators, including those which contribute to the public award of between zero and three performance ‘stars’. This raises questions about the extent to which employees can exercise autonomy in the context of rigid top‐down directives. This paper presents findings from a study using participant observation and interviews to examine the impact of a training course aimed ostensibly at increasing employee autonomy in an English PCT. The suggestion is that attempts to make employees more autonomous can be seen as a strategy for increasing central control based upon the internalisation by the employees of centrally promulgated values. The attraction of such strategies is that they may be potentially more effective and less costly than alternative strategies of direct control. However, the study suggests that the outcome of attempts by such methods as programmes to increase employee autonomy may be very different from those intended.  相似文献   
109.
The ability of 12 new thiazole derivatives to influence the muscle contractility mediated by purine P2X receptors has been studied in vitro using isolated tissues of rats and guinea pigs. Most of the synthesized compounds did not cause significant effects, but two compounds exhibited pronounced antagonism with respect to P2X-mediated contractility response. These compounds offer a good starting point for the synthesis of new effective antagonists of P2 receptors. __________ Translated from Khimiko-Farmatsevticheskii Zhurnal, Vol. 39, No. 6, pp. 22 – 25, June, 2005.  相似文献   
110.
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