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   1697353篇
  免费   117134篇
  国内免费   2435篇
耳鼻咽喉   23643篇
儿科学   56142篇
妇产科学   48221篇
基础医学   258538篇
口腔科学   45922篇
临床医学   147674篇
内科学   325760篇
皮肤病学   36410篇
神经病学   127393篇
特种医学   66048篇
外国民族医学   410篇
外科学   259382篇
综合类   33256篇
现状与发展   2篇
一般理论   416篇
预防医学   125158篇
眼科学   39134篇
药学   129583篇
  2篇
中国医学   3371篇
肿瘤学   90457篇
  2018年   16558篇
  2016年   14077篇
  2015年   16044篇
  2014年   21985篇
  2013年   33244篇
  2012年   46598篇
  2011年   50363篇
  2010年   29550篇
  2009年   27402篇
  2008年   47884篇
  2007年   52099篇
  2006年   52343篇
  2005年   51027篇
  2004年   49346篇
  2003年   47939篇
  2002年   46940篇
  2001年   74887篇
  2000年   76895篇
  1999年   64978篇
  1998年   18430篇
  1997年   16227篇
  1996年   16543篇
  1995年   15549篇
  1994年   14608篇
  1993年   13671篇
  1992年   51887篇
  1991年   52244篇
  1990年   51839篇
  1989年   50465篇
  1988年   46964篇
  1987年   46183篇
  1986年   43765篇
  1985年   41878篇
  1984年   31270篇
  1983年   27050篇
  1982年   15671篇
  1981年   13946篇
  1979年   29718篇
  1978年   20938篇
  1977年   17859篇
  1976年   17330篇
  1975年   19459篇
  1974年   22704篇
  1973年   21883篇
  1972年   20668篇
  1971年   19377篇
  1970年   18091篇
  1969年   17203篇
  1968年   16243篇
  1967年   14401篇
排序方式: 共有10000条查询结果,搜索用时 31 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