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   1843890篇
  免费   116772篇
  国内免费   2411篇
耳鼻咽喉   24548篇
儿科学   61852篇
妇产科学   50567篇
基础医学   271609篇
口腔科学   46869篇
临床医学   157111篇
内科学   351511篇
皮肤病学   36692篇
神经病学   141104篇
特种医学   73595篇
外国民族医学   410篇
外科学   283992篇
综合类   35118篇
现状与发展   2篇
一般理论   399篇
预防医学   140087篇
眼科学   41483篇
药学   137456篇
  2篇
中国医学   3979篇
肿瘤学   104687篇
  2018年   36594篇
  2017年   28102篇
  2016年   31927篇
  2015年   16633篇
  2014年   22306篇
  2013年   33353篇
  2012年   52209篇
  2011年   68994篇
  2010年   46429篇
  2009年   37587篇
  2008年   65206篇
  2007年   71369篇
  2006年   52181篇
  2005年   52374篇
  2004年   51856篇
  2003年   51356篇
  2002年   48622篇
  2001年   74708篇
  2000年   76799篇
  1999年   64720篇
  1998年   18425篇
  1997年   16265篇
  1996年   16420篇
  1995年   15493篇
  1994年   14568篇
  1992年   51606篇
  1991年   52045篇
  1990年   51661篇
  1989年   50285篇
  1988年   46790篇
  1987年   45970篇
  1986年   43597篇
  1985年   41678篇
  1984年   31061篇
  1983年   26888篇
  1982年   15584篇
  1981年   13866篇
  1979年   29578篇
  1978年   20837篇
  1977年   17780篇
  1976年   17244篇
  1975年   19353篇
  1974年   22603篇
  1973年   21771篇
  1972年   20545篇
  1971年   19293篇
  1970年   18023篇
  1969年   17162篇
  1968年   16178篇
  1967年   14331篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Journal of Behavioral Medicine - Evidence supports the use of graphic warnings to educate the public about the health harms of smoking and suggests warnings eliciting negative emotional responses...  相似文献   
3.
The adrenal cortex gives rise to a biologically heterogenous group of neoplasms, each with a distinct morphology, antigen expression and molecular profile. Adrenal cortical adenomas have excellent prognosis and are usually cured by surgical resection alone, while adrenal cortical carcinomas are very aggressive tumors with a poor prognosis regardless of therapy. These tumors are rare and often challenging for a pathologist to diagnose, as significant overlap exists between benign and malignant lesions in some cases. In this review, we attempt to summarize most important histologic and clinical features of adrenal cortical adenomas and carcinomas, clarify the use of different grading systems, the use of special stains and the differential diagnosis for practicing pathologists. Most relevant hereditary syndromes associated with adrenal cortical tumors are listed. Updates in molecular alterations in adrenal cortical neoplasms and hyperplastic diseases as well as their clinical significance and potential therapeutic implications are also discussed.  相似文献   
4.
5.
6.
7.
8.
9.
Journal of Immigrant and Minority Health - COVID-19 has disproportionally affected underrepresented minorities (URM) and low-income immigrants in the United States. The aim of the study is to...  相似文献   
10.
Vaccination is a vital health care initiative to prevent individual and population infection. To increase vaccination rates the federal government implemented the ‘No Jab, No Pay’ policy, where eligibility for several government benefits required children to be fully vaccinated by removing ‘conscientious objections’ and expanding the age range of children whose families receive benefits. This study assesses the impact of this policy at a local area within a single medical practice community in NSW, Australia. A retrospective clinical audit was performed between 2012 and 2017 on a single general practice's vaccination records for children ≤19 years. Catch-up vaccinations were assessed based on age at vaccination. Incidence of catch-up vaccinations was assessed for each of four years before and two years after the implementation of the ‘No Jab, No Pay’ policy in January 2016, along with the age of children and vaccination(s) given. Catch-up vaccinations were assessed temporally either side of implementation of ‘No Jab, No Pay’. Comparing the average annual vaccination catch-up incidence rate of 6.2% pre-implementation (2012–2015), there was an increase to 9.2% in 2016 (p < .001) and 7.8% in 2017 (p = .027). Secondary outcome measurement of catch-up vaccination incidence rates before (2012–2015) and after (2016–2017) ‘No Jab, No Pay’ implementation showed statistically significant increases for children aged 8–11 years (3.2%–5.6%, p = .038), 12–15 years (7.5%–14.7%, p < .001) and 16–19 years (3.3%–10.2%, p < .001) along with a statistically significant reduction in children aged 1–3 years (11.4%–6.2%, p = .015). Also, catch-up rates for DTPa significantly increased after program implementation. This study demonstrates that the Australian federal government vaccination policy ‘No Jab, No Pay’ was coincident with an increase in catch-up vaccinations within a rural NSW community served by one medical practice, especially for older children.  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