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   3343225篇
  免费   260320篇
  国内免费   6721篇
耳鼻咽喉   49277篇
儿科学   102526篇
妇产科学   90663篇
基础医学   467305篇
口腔科学   98533篇
临床医学   301031篇
内科学   651371篇
皮肤病学   71103篇
神经病学   278490篇
特种医学   133265篇
外国民族医学   1258篇
外科学   509996篇
综合类   79468篇
现状与发展   7篇
一般理论   1363篇
预防医学   260605篇
眼科学   80365篇
药学   250334篇
  8篇
中国医学   6536篇
肿瘤学   176762篇
  2018年   33955篇
  2016年   29291篇
  2015年   33043篇
  2014年   47399篇
  2013年   71965篇
  2012年   96539篇
  2011年   102150篇
  2010年   60259篇
  2009年   58200篇
  2008年   97043篇
  2007年   103911篇
  2006年   104774篇
  2005年   102427篇
  2004年   98392篇
  2003年   95149篇
  2002年   93716篇
  2001年   150637篇
  2000年   155499篇
  1999年   132215篇
  1998年   38483篇
  1997年   34952篇
  1996年   33962篇
  1995年   32823篇
  1994年   30712篇
  1993年   28550篇
  1992年   105508篇
  1991年   101771篇
  1990年   98716篇
  1989年   95553篇
  1988年   88797篇
  1987年   87486篇
  1986年   83361篇
  1985年   79656篇
  1984年   60356篇
  1983年   51444篇
  1982年   31554篇
  1981年   28275篇
  1980年   26475篇
  1979年   57083篇
  1978年   40526篇
  1977年   34667篇
  1976年   32033篇
  1975年   34713篇
  1974年   42183篇
  1973年   40377篇
  1972年   38202篇
  1971年   35551篇
  1970年   33580篇
  1969年   31485篇
  1968年   28979篇
排序方式: 共有10000条查询结果,搜索用时 109 毫秒
31.
32.
33.
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   
34.
35.
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   

36.
37.
38.
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   

39.
40.
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   
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