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   1689920篇
  免费   116629篇
  国内免费   2415篇
耳鼻咽喉   23552篇
儿科学   55897篇
妇产科学   47921篇
基础医学   257462篇
口腔科学   45599篇
临床医学   146843篇
内科学   324455篇
皮肤病学   36141篇
神经病学   126501篇
特种医学   65681篇
外国民族医学   410篇
外科学   258437篇
综合类   32995篇
现状与发展   2篇
一般理论   403篇
预防医学   124231篇
眼科学   39613篇
药学   129349篇
  2篇
中国医学   3366篇
肿瘤学   90104篇
  2018年   16360篇
  2016年   13972篇
  2015年   15931篇
  2014年   21813篇
  2013年   33006篇
  2012年   46244篇
  2011年   49970篇
  2010年   29314篇
  2009年   27187篇
  2008年   47620篇
  2007年   51843篇
  2006年   52094篇
  2005年   50775篇
  2004年   49073篇
  2003年   47659篇
  2002年   46651篇
  2001年   74674篇
  2000年   76660篇
  1999年   64770篇
  1998年   18327篇
  1997年   16151篇
  1996年   16434篇
  1995年   15480篇
  1994年   14540篇
  1993年   13608篇
  1992年   51751篇
  1991年   52100篇
  1990年   51689篇
  1989年   50330篇
  1988年   46852篇
  1987年   46056篇
  1986年   43683篇
  1985年   41762篇
  1984年   31142篇
  1983年   26939篇
  1982年   15613篇
  1981年   13904篇
  1979年   29642篇
  1978年   20891篇
  1977年   17825篇
  1976年   17276篇
  1975年   19387篇
  1974年   22640篇
  1973年   21818篇
  1972年   20589篇
  1971年   19337篇
  1970年   18046篇
  1969年   17176篇
  1968年   16193篇
  1967年   14361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