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   1354434篇
  免费   99974篇
  国内免费   2147篇
耳鼻咽喉   19163篇
儿科学   44601篇
妇产科学   39893篇
基础医学   199338篇
口腔科学   37759篇
临床医学   115479篇
内科学   266769篇
皮肤病学   27766篇
神经病学   106817篇
特种医学   53328篇
外国民族医学   413篇
外科学   208336篇
综合类   27021篇
现状与发展   2篇
一般理论   407篇
预防医学   99776篇
眼科学   30431篇
药学   102886篇
  1篇
中国医学   2646篇
肿瘤学   73723篇
  2018年   13420篇
  2016年   11529篇
  2015年   13254篇
  2014年   18062篇
  2013年   27576篇
  2012年   37945篇
  2011年   40509篇
  2010年   24161篇
  2009年   22690篇
  2008年   39008篇
  2007年   42105篇
  2006年   42619篇
  2005年   41686篇
  2004年   40146篇
  2003年   38763篇
  2002年   38221篇
  2001年   60593篇
  2000年   62107篇
  1999年   52995篇
  1998年   15313篇
  1997年   13695篇
  1996年   13025篇
  1995年   13068篇
  1994年   12381篇
  1993年   11487篇
  1992年   42625篇
  1991年   41965篇
  1990年   41403篇
  1989年   40194篇
  1988年   37415篇
  1987年   36618篇
  1986年   34918篇
  1985年   33258篇
  1984年   24759篇
  1983年   21500篇
  1982年   12801篇
  1981年   11347篇
  1979年   23306篇
  1978年   16242篇
  1977年   14072篇
  1976年   13245篇
  1975年   14585篇
  1974年   17127篇
  1973年   16451篇
  1972年   15719篇
  1971年   14600篇
  1970年   13519篇
  1969年   12972篇
  1968年   12202篇
  1967年   10683篇
排序方式: 共有10000条查询结果,搜索用时 734 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.
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