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   1313017篇
  免费   97199篇
  国内免费   2158篇
耳鼻咽喉   18619篇
儿科学   43108篇
妇产科学   38648篇
基础医学   192289篇
口腔科学   36207篇
临床医学   111838篇
内科学   258768篇
皮肤病学   27450篇
神经病学   103019篇
特种医学   51732篇
外国民族医学   368篇
外科学   204585篇
综合类   26897篇
现状与发展   1篇
一般理论   376篇
预防医学   94587篇
眼科学   29792篇
药学   100154篇
  1篇
中国医学   2554篇
肿瘤学   71381篇
  2018年   13160篇
  2016年   11114篇
  2015年   12829篇
  2014年   17645篇
  2013年   26297篇
  2012年   36639篇
  2011年   38954篇
  2010年   22929篇
  2009年   21541篇
  2008年   37356篇
  2007年   40356篇
  2006年   40758篇
  2005年   39865篇
  2004年   38324篇
  2003年   37151篇
  2002年   36546篇
  2001年   58514篇
  2000年   59992篇
  1999年   51112篇
  1998年   14613篇
  1997年   13104篇
  1996年   13289篇
  1995年   12553篇
  1994年   11938篇
  1993年   11043篇
  1992年   41267篇
  1991年   40616篇
  1990年   40101篇
  1989年   38896篇
  1988年   36282篇
  1987年   35503篇
  1986年   33886篇
  1985年   32320篇
  1984年   24068篇
  1983年   20931篇
  1982年   12459篇
  1981年   11010篇
  1979年   22743篇
  1978年   15952篇
  1977年   13800篇
  1976年   13050篇
  1975年   14262篇
  1974年   16775篇
  1973年   16135篇
  1972年   15404篇
  1971年   14311篇
  1970年   13267篇
  1969年   12791篇
  1968年   12033篇
  1967年   10527篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
5.
6.
Jones type fifth metatarsal fractures pose a challenge to the foot and ankle surgeon, given documented high nonunion rates as well as high complication rates including hardware prominence, nerve injury, and screw breakage for existing treatment modalities including screw and plantar plate fixation. We call for the design of innovative Jones-fracture specific implants which contour to the natural curve of the fifth metatarsal. Future research should aim to expand upon existing literature for Jones fracture fixation and evaluate efficacy of novel implants which are designed to address unacceptably high complication rates for existing treatment modalities.  相似文献   
7.
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   
8.
Journal of Neuro-Oncology - Adjuvant radiation is often used in patients with low grade gliomas with high-risk characteristics with a recommended dose of 45–54&nbsp;Gy. We used the...  相似文献   
9.
Abstract

Oocyte maturation defect is a challenging situation in the management of infertility, the etiology may be related to endocrine causes, protocols used in ovarian stimulation, oocyte intrinsic defects or procedures in embryology laboratory. We report three Mexican females in treatment for primary infertility with non-mature oocytes after ovary stimulation and oocyte capture in whom a genetic diagnosis of TUBB8-oocyte maturation defect was revealed by exome sequencing. Two couples achieved pregnancies though oocyte donation after establishing the genetic etiology. Our results expand the role of TUBB8-disorders in patients of non-Asian ethnicity. Oocyte maturation defects of monogenic origin are a growing group of disorders that endocrinologists and reproductive medicine specialists should be aware in order to provide referral to genetics for establish a correct and opportune diagnosis.  相似文献   
10.
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