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   1410990篇
  免费   113226篇
  国内免费   3332篇
耳鼻咽喉   18361篇
儿科学   46547篇
妇产科学   41052篇
基础医学   200766篇
口腔科学   37753篇
临床医学   126001篇
内科学   284339篇
皮肤病学   33354篇
神经病学   116853篇
特种医学   53848篇
外国民族医学   464篇
外科学   210484篇
综合类   32755篇
现状与发展   3篇
一般理论   487篇
预防医学   110010篇
眼科学   31488篇
药学   98499篇
  1篇
中国医学   3347篇
肿瘤学   81136篇
  2021年   10849篇
  2019年   11660篇
  2018年   16572篇
  2017年   12665篇
  2016年   14256篇
  2015年   15999篇
  2014年   22550篇
  2013年   33384篇
  2012年   45374篇
  2011年   47910篇
  2010年   28152篇
  2009年   27043篇
  2008年   44312篇
  2007年   46817篇
  2006年   47384篇
  2005年   45850篇
  2004年   43739篇
  2003年   41684篇
  2002年   40184篇
  2001年   73004篇
  2000年   74531篇
  1999年   61564篇
  1998年   16989篇
  1997年   15435篇
  1996年   15587篇
  1995年   14792篇
  1994年   13397篇
  1993年   12583篇
  1992年   45844篇
  1991年   43482篇
  1990年   41493篇
  1989年   39560篇
  1988年   36193篇
  1987年   35358篇
  1986年   32871篇
  1985年   31284篇
  1984年   23825篇
  1983年   20027篇
  1982年   12208篇
  1981年   10783篇
  1979年   20703篇
  1978年   14580篇
  1977年   12085篇
  1976年   11367篇
  1975年   11620篇
  1974年   13988篇
  1973年   13535篇
  1972年   12637篇
  1971年   11470篇
  1970年   10910篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
Hawi  N.  von Falck  C.  Krettek  C.  Meller  R. 《Der Unfallchirurg》2019,122(12):944-949
Die Unfallchirurgie - Zur Diagnostik von Schultergelenkerkrankungen wird routinemäßig die Magnetresonanztomographie (MRT) durchgeführt. Diese kann entsprechend der klinischen...  相似文献   
102.
BackgroundWomen suffering from kidney disease are more prone to fertility problems, due to uremia. Fortunately, their fertility rate increases dramatically after renal transplantation. This study analyzes the predictors/risk factors of successful pregnancy with live birth outcome while presenting an overview of the 7-year experience of a single center.MethodsThis retrospective cohort study includes 239 women of reproductive age (18–40 years) who underwent renal transplantation in a tertiary Turkish clinic between October 1, 2011, and August 24, 2017. The subjects were invited to take part in a survey questioning their obstetric characteristics and they were assessed in 2 groups: fertile and infertile. Multivariable linear regression analysis was conducted to determine the predictors of a successful pregnancy.ResultsThirty-five 35 patients wished to become pregnant: 12 got pregnant spontaneously, while 21 failed to become pregnant (spontaneously). The mean age of the patients at the survey was 34 ± 7. Regular menstrual cycles after renal transplantation, tacrolimus-mycophenolate mofetil maintenance protocol, and age at transplantation were found to be predictors of spontaneous pregnancy. The duration of peritoneal dialysis was significantly longer in the infertile group (48 vs 12 months).ConclusionEnd-stage renal disease's negative impacts, including menstrual abnormality and fertility problems, can be overcome by successful kidney transplantation with appropriate immunosuppression. Minimizing the duration of peritoneal dialysis, particularly in patients who desire future fertility, may be accepted as a logical management strategy.  相似文献   
103.
104.
105.
106.
107.
108.
Objectives: There is a paucity of reporting on surgical outcomes of isolated posterior cruciate ligament reconstruction (PCLR). We hypothesize that isolated PCL injuries failing nonoperative treatment achieve good outcomes and are able to return to sport following PCLR.

Methods: A retrospective analysis was performed to identify patients with isolated PCL injuries that underwent reconstruction between 2001 and 2014. Patients with multi-ligamentous injury or another concomitant knee pathology were excluded. Medical records were reviewed for demographic, clinical and operative data. Patients were contacted for administration of a telephone-based questionnaire which included the International Knee Documentation Committee (IKDC) Subjective Knee Evaluation form, Lysholm-Tegner scales, Marx activity scale (MAS), return to sport status, and patient satisfaction instruments.

Results: A total of 15 isolated PCL reconstructions in 14 patients with a mean age of 27.5 years (range 17–43) met the study inclusion criteria; mean follow up was 6.3 years (range 1.4–15.2). Pre-operatively, the primary complaint was knee instability in all patients; on physical examination, lack of a firm end point during posterior drawer testing was found in 93% (14/15) of the knees. In total, 12 of 15 knees underwent transtibial, single-bundle PCLR and three of 15 underwent tibial inlay, double bundle PCLR. Graft types included: quadriceps autograft (7/15), Achilles allograft (6/15), and hamstring autograft (2/15). There were no graft failures in our patient cohort. At most recent follow up the mean scores respectively on the IKDC form, Lysholm-Tegner scales and MAS were (standard deviation): 77.3 (16.5), 83.1 (17.9), 6.13 (2.6), and 7.1 (6.0). All fourteen patients were athletes prior to their injury and 79% (11/14) returned to sport and overall patient satisfaction was 9.2/10.

Conclusions: Isolated PCLR provides good outcomes at mean medium-term follow up with restoration of function, high rate of return to sport and overall patient satisfaction.  相似文献   

109.
110.
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