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   2656513篇
  免费   218472篇
  国内免费   5538篇
耳鼻咽喉   37546篇
儿科学   80381篇
妇产科学   68295篇
基础医学   372564篇
口腔科学   73761篇
临床医学   244892篇
内科学   526599篇
皮肤病学   52819篇
神经病学   228322篇
特种医学   106233篇
外国民族医学   901篇
外科学   403610篇
综合类   60279篇
现状与发展   1篇
一般理论   1337篇
预防医学   215271篇
眼科学   62809篇
药学   196100篇
  9篇
中国医学   4818篇
肿瘤学   143976篇
  2021年   22238篇
  2019年   23065篇
  2018年   30909篇
  2017年   23866篇
  2016年   26183篇
  2015年   29798篇
  2014年   42996篇
  2013年   64210篇
  2012年   88279篇
  2011年   92962篇
  2010年   54499篇
  2009年   51909篇
  2008年   87216篇
  2007年   92630篇
  2006年   93190篇
  2005年   91432篇
  2004年   87260篇
  2003年   83794篇
  2002年   81903篇
  2001年   115259篇
  2000年   118802篇
  1999年   101244篇
  1998年   31376篇
  1997年   28365篇
  1996年   27934篇
  1995年   26975篇
  1994年   25205篇
  1993年   23343篇
  1992年   81034篇
  1991年   77874篇
  1990年   74833篇
  1989年   72079篇
  1988年   67046篇
  1987年   65975篇
  1986年   62513篇
  1985年   59589篇
  1984年   45644篇
  1983年   38961篇
  1982年   24521篇
  1981年   21880篇
  1979年   42217篇
  1978年   29968篇
  1977年   25191篇
  1976年   23619篇
  1975年   24613篇
  1974年   30360篇
  1973年   28647篇
  1972年   26758篇
  1971年   24563篇
  1970年   23143篇
排序方式: 共有10000条查询结果,搜索用时 234 毫秒
31.
Secondary tricuspid regurgitation (TR) caused by right ventricular enlargement in the setting of left heart disease/pulmonary hypertension has been well described. In contrast, that associated with right atrial enlargement—atrial functional TR (AF‐TR)—remains largely underappreciated. AF‐TR most often occurs in the setting of lone atrial fibrillation, although it is also seen in its absence (idiopathic AF‐TR). Several recent studies have found that the prevalence, hemodynamic significance, and prognosis of AF‐TR are not inconsequential, suggesting increased physician awareness of this novel clinical entity is warranted. This article discusses the pathogenesis, echocardiographic findings, and treatment of this underappreciated cause of secondary TR.  相似文献   
32.
33.
Introduction: Pharmacovigilance is essential to monitoring the safety profiles of authorized medicines. Compared with small-molecule drugs, biological drugs are more complex, more susceptible to structural variability due to manufacturing processes, and have the potential to induce immune-related reactions, underscoring the importance of safety monitoring for these products. Although highly similar to reference products, biosimilars are not expected to be structurally identical. For these reasons, proper reporting of potential adverse drug reactions (ADRs) using distinguishable names and batch numbers is essential for accurate tracing of all biological drugs. To address the need for robust pharmacovigilance, the European Parliament and Council of the European Union provided legislation regarding pharmacovigilance of biologics in 2010.

Areas covered: This narrative review examines the current state of pharmacovigilance for biologics in the European Union (EU) and discusses relevant information on pharmacovigilance of biosimilars, the current EU pharmacovigilance system, and areas that could be improved.

Expert opinion: Although steps have been taken to improve pharmacovigilance of biologics in the EU, several enhancements can still be made, including additional training for healthcare professionals on ADR reporting, the use of 2D barcodes that enhance traceability, and an open discussion of potentially missed opportunities in the pharmacovigilance of biosimilars.  相似文献   

34.
35.
36.
Background: Traumatic brain injury (TBI) results in verbal recall deficits and impaired processing of emotion encoded in facial appearance, prosody and the linguistic content of messages. Emotion facilitates memory (emotional memory advantage) for non-brain injured (NBI) individuals but the impact of emotion on verbal recall for linguistically encoded stimuli in TBI has not been explored.

Aims: The purpose of this study was to determine the effects of stimulus emotional content on verbal recall of words and paragraphs in TBI compared to NBI individuals.

Methods and procedures: Six 10-item lists, each with five emotional and five neutral words, and six paragraphs (three emotional, three neutral) were counterbalanced and presented in random order to 20 individuals with TBI and 44 NBI. The number of words from lists and the number of content units from paragraphs were compared for the two groups.

Outcomes and results: The NBI participants recalled more words from the lists and content units from the paragraphs than the individuals with TBI. Both groups recalled significantly more emotional than neutral words. NBI but not TBI participants had significantly greater recall for information in paragraphs with emotional content.

Conclusions: Participants with TBI showed impaired recall of words and paragraph content. Emotion facilitated word and paragraph content recall for neurotypical individuals but emotional memory advantage was limited to words for the TBI participants.  相似文献   

37.
38.
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   
39.
40.
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