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   83439篇
  免费   3814篇
  国内免费   341篇
耳鼻咽喉   1045篇
儿科学   2179篇
妇产科学   2047篇
基础医学   10985篇
口腔科学   3000篇
临床医学   6024篇
内科学   20839篇
皮肤病学   1758篇
神经病学   7149篇
特种医学   2507篇
外国民族医学   6篇
外科学   9793篇
综合类   428篇
一般理论   31篇
预防医学   8691篇
眼科学   1326篇
药学   5469篇
中国医学   307篇
肿瘤学   4010篇
  2023年   553篇
  2022年   1047篇
  2021年   2286篇
  2020年   1215篇
  2019年   1966篇
  2018年   4038篇
  2017年   2468篇
  2016年   1850篇
  2015年   1961篇
  2014年   2762篇
  2013年   3691篇
  2012年   5651篇
  2011年   5927篇
  2010年   3209篇
  2009年   2723篇
  2008年   4797篇
  2007年   5014篇
  2006年   4600篇
  2005年   4595篇
  2004年   4159篇
  2003年   3872篇
  2002年   3595篇
  2001年   1845篇
  2000年   1955篇
  1999年   1598篇
  1998年   600篇
  1997年   409篇
  1996年   387篇
  1995年   338篇
  1994年   282篇
  1993年   280篇
  1992年   801篇
  1991年   638篇
  1990年   620篇
  1989年   527篇
  1988年   469篇
  1987年   488篇
  1986年   422篇
  1985年   370篇
  1984年   271篇
  1983年   235篇
  1979年   198篇
  1978年   172篇
  1975年   174篇
  1974年   181篇
  1973年   169篇
  1972年   168篇
  1971年   163篇
  1970年   146篇
  1968年   150篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
The 2008 dioxin crisis occurred as a result of contamination of Irish pork. The event had significant implications for Ireland’s economy and the reputation of its agricultural industry, as well as raising concerns for human health. This study describes the results of a content analysis of Irish and UK newspaper coverage of the 2008 Irish dioxin crisis, as this is likely to provide insight into how public perceptions of this issue were shaped. Articles from 16 print publications were systematically sampled for the period December 2008 to February 2009. The resulting data set of 141 articles was examined using a coding protocol developed based on previous research and refined during piloting. Results indicated that the dioxin crisis was primarily portrayed by the media as an industry/economic crisis, dominant in 26.9% of articles in the sample. Within this dominant portrayal, the agricultural industry was frequently cited as being in crisis (42.6%); however, the implications of the crisis on the wider economic environment also received attention (17.7%). Differences between Irish and UK-based media were also examined, revealing that while the Irish media most frequently described the crisis in terms of its impact on the industry and economy, the UK media were more likely to portray the crisis as a risk to health. These dominant media messages and message framings have implications for the public understanding of the issue in each country and potential consequences regarding perception of the adequacy of existing food policy and regulatory oversight.  相似文献   
22.
23.
Serum lactate is a non-specific marker of tissue hypoperfusion. Elevated serum lactate is used in the differential diagnosis of acute intestinal ischemia. Although this practice is controversial, in the absence of other validated markers lactate is still used because of its high sensitivity.We present the cases of two patients who developed acute mesenteric ischemia as a post-surgical complication. The patients reported moderate abdominal pain —a non-specific symptom in the postoperative context— and tests showed progressively increasing serum lactate levels, which facilitated suspicion and subsequent diagnostic confirmation through an imaging test.These cases highlight the physiopathological importance of lactate elevation in the perioperative context and of performing a differential diagnosis of its possible causes, including mesenteric ischemia. Although the outcome was negative in the first case, early suspicion allowed us to make an effective diagnosis and administer appropriate treatment in the second patient.  相似文献   
24.
25.
26.
27.
International Journal of Legal Medicine - Gyula Ágner was a Royal Hungarian First Lieutenant (1st Lt.) during the World War II and died at 30 years old due to a mine shrapnel injury...  相似文献   
28.
Eye drops contain several ophthalmic medications which can produce allergic reactions. We report the case of a patient with contact dermatitis from neomycin and a probable fixed exanthema after parenteral administration of tobramycin who tolerated topical tobramycin and other aminoglycosides.  相似文献   
29.
30.
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