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   6179篇
  免费   513篇
  国内免费   16篇
耳鼻咽喉   51篇
儿科学   244篇
妇产科学   123篇
基础医学   875篇
口腔科学   99篇
临床医学   555篇
内科学   1071篇
皮肤病学   46篇
神经病学   552篇
特种医学   354篇
外科学   1144篇
综合类   127篇
一般理论   17篇
预防医学   550篇
眼科学   53篇
药学   367篇
中国医学   6篇
肿瘤学   474篇
  2023年   41篇
  2022年   23篇
  2021年   153篇
  2020年   97篇
  2019年   144篇
  2018年   169篇
  2017年   114篇
  2016年   135篇
  2015年   144篇
  2014年   225篇
  2013年   310篇
  2012年   438篇
  2011年   438篇
  2010年   211篇
  2009年   209篇
  2008年   337篇
  2007年   355篇
  2006年   287篇
  2005年   296篇
  2004年   301篇
  2003年   215篇
  2002年   230篇
  2001年   151篇
  2000年   138篇
  1999年   132篇
  1998年   49篇
  1997年   54篇
  1996年   44篇
  1995年   56篇
  1994年   41篇
  1993年   24篇
  1992年   98篇
  1991年   88篇
  1990年   111篇
  1989年   94篇
  1988年   74篇
  1987年   80篇
  1986年   80篇
  1985年   61篇
  1984年   51篇
  1983年   39篇
  1982年   26篇
  1981年   26篇
  1979年   41篇
  1978年   27篇
  1977年   20篇
  1975年   18篇
  1974年   30篇
  1972年   20篇
  1971年   18篇
排序方式: 共有6708条查询结果,搜索用时 16 毫秒
1.
2.
Globally, the COVID‐19 pandemic has already led to major increases in unemployment and is expected to lead to unprecedented increases in poverty and food and nutrition insecurity, as well as poor health outcomes. Families where young children, youth, pregnant and lactating women live need to be protected against the ongoing protracted pandemic and the aftershocks that are very likely to follow for years to come. The future wellbeing of the vast majority of the world now depends on reconfiguring the current ineffective food, nutrition, health, and social protection systems to ensure food and nutrition security for all. Because food, nutrition, health, and socio‐economic outcomes are intimately inter‐linked, it is essential that we find out how to effectively address the need to reconfigure and to provide better intersecoral coordination among global and local food, health care, and social protection systems taking equity and sutainability principles into account. Implementation science research informed by complex adaptive sytems frameworks will be needed to fill in the major knowledge gaps. Not doing so will not only put the development of individuals at further risk, but also negatively impact on the development potential of entire nations and ultimately our planet.  相似文献   
3.
4.
5.
6.
7.
The aim of the study was to describe the experience, current trends and management of incontinence surgery for urodynamic stress incontinence (USI) in the United Kingdom. The study was a postal questionnaire survey that was sent to a cohort of surgeons known to be performing continence surgery. The subjects addressed included the considered role of the surgeon, the total number and type of operations performed in the last year, urodynamics and physiotherapy prior to incontinence surgery, operative complications, postoperative advice and follow-up (lengths and methods). The response rate was 54%. Large variations were found in all areas. The survey provides evidence of the number of incontinence operations performed, potentially important trends and differences in the practice and management of incontinence in the United Kingdom. This survey may be helpful in making guidelines and standards for audit at regional, local and individual levels as well as recommendations for strategies to enhance professional expertise in urogynaecology in the United Kingdom.  相似文献   
8.
9.
We describe 3 patients with ureteral calculi who failed multiple extracorporeal shock wave lithotripsy treatments and whose stones could not be visualized by ureteroscopy despite radiological confirmation. We contend that these ureteral stones migrated submucosally and are refractory to the aforementioned treatment modalities. Each patient had a common presenting complaint of intermittent flank pain 5 years in duration, leading us to believe that long-standing stone impaction is a prerequisite for this entity. Our experience is reviewed.  相似文献   
10.
Survivorship of cemented knee replacements   总被引:9,自引:0,他引:9  
The survivorship method of analysis has been used to compare the failure rate and overall success of 1,430 cemented primary total knee arthroplasties performed at The Hospital for Special Surgery over a 15-year period. There were 224 total condylar prostheses with a polyethylene tibia, 289 of the posterior stabilised type with an all polyethylene tibia, and 917 posterior stabilised with a metal-backed tibial component. There were 12 failures in the total condylar series, giving an average annual failure rate of 0.65% and a 15-year success rate of 90.56%. The posterior stabilised prosthesis with a polyethylene tibia showed an average annual failure rate of 0.27% and a 10-year success rate of 97.34%, and this prosthesis with a metal-backed tibial component gave an annual failure rate of 0.19% and a seven-year success rate of 98.75%. The overall survival rate was not influenced by sex or age, diagnosis or the percentage of ideal body weight. No metal-backed tibial components have yet needed revision for loosening. It seems that infection will be the major cause of failure.  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