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   1440465篇
  免费   98190篇
  国内免费   2773篇
耳鼻咽喉   20624篇
儿科学   48388篇
妇产科学   42789篇
基础医学   208359篇
口腔科学   40280篇
临床医学   121035篇
内科学   279957篇
皮肤病学   30509篇
神经病学   109456篇
特种医学   59348篇
外国民族医学   461篇
外科学   221871篇
综合类   28464篇
现状与发展   1篇
一般理论   303篇
预防医学   106504篇
眼科学   32916篇
药学   109641篇
  9篇
中国医学   2908篇
肿瘤学   77605篇
  2018年   15518篇
  2017年   12841篇
  2016年   13258篇
  2015年   16245篇
  2014年   20216篇
  2013年   27881篇
  2012年   42937篇
  2011年   40935篇
  2010年   23646篇
  2009年   23765篇
  2008年   37326篇
  2007年   40882篇
  2006年   41532篇
  2005年   48342篇
  2004年   48326篇
  2003年   43169篇
  2002年   38172篇
  2001年   61589篇
  2000年   61202篇
  1999年   55119篇
  1998年   14774篇
  1997年   13076篇
  1996年   12650篇
  1995年   12674篇
  1994年   12018篇
  1992年   46107篇
  1991年   45705篇
  1990年   45401篇
  1989年   43976篇
  1988年   40945篇
  1987年   40065篇
  1986年   38154篇
  1985年   36157篇
  1984年   26636篇
  1983年   22974篇
  1982年   13097篇
  1981年   11474篇
  1979年   25563篇
  1978年   17667篇
  1977年   15058篇
  1976年   14134篇
  1975年   16055篇
  1974年   19074篇
  1973年   18202篇
  1972年   17464篇
  1971年   16341篇
  1970年   15240篇
  1969年   14700篇
  1968年   13749篇
  1967年   12200篇
排序方式: 共有10000条查询结果,搜索用时 18 毫秒
1.
2.
3.
4.
5.
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   
6.
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.
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