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   865985篇
  免费   70811篇
  国内免费   1849篇
耳鼻咽喉   12836篇
儿科学   24718篇
妇产科学   25141篇
基础医学   124637篇
口腔科学   25629篇
临床医学   75655篇
内科学   165544篇
皮肤病学   17000篇
神经病学   70486篇
特种医学   35356篇
外国民族医学   171篇
外科学   136792篇
综合类   24665篇
现状与发展   2篇
一般理论   264篇
预防医学   67088篇
眼科学   20614篇
药学   64909篇
中国医学   1595篇
肿瘤学   45543篇
  2018年   7390篇
  2015年   7771篇
  2014年   11194篇
  2013年   16900篇
  2012年   22858篇
  2011年   23991篇
  2010年   13941篇
  2009年   13155篇
  2008年   22750篇
  2007年   24776篇
  2006年   24633篇
  2005年   24280篇
  2004年   23819篇
  2003年   22959篇
  2002年   22051篇
  2001年   35972篇
  2000年   36612篇
  1999年   31024篇
  1998年   9272篇
  1997年   8589篇
  1996年   8510篇
  1995年   8038篇
  1994年   7753篇
  1992年   26772篇
  1991年   26205篇
  1990年   25731篇
  1989年   24783篇
  1988年   23319篇
  1987年   22966篇
  1986年   21828篇
  1985年   21174篇
  1984年   16426篇
  1983年   14035篇
  1982年   8892篇
  1981年   8241篇
  1980年   7703篇
  1979年   16787篇
  1978年   12157篇
  1977年   10212篇
  1976年   9357篇
  1975年   10174篇
  1974年   12672篇
  1973年   12180篇
  1972年   11579篇
  1971年   10708篇
  1970年   10255篇
  1969年   9935篇
  1968年   8925篇
  1967年   8261篇
  1966年   7683篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
52.
53.
54.
55.
56.
57.
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   

58.
Luckscheiter  A.  Lohs  T.  Fischer  M.  Zink  W. 《Der Anaesthesist》2020,69(3):170-182
Die Anaesthesiologie - Das Management des schwierigen Atemwegs ist eine präklinische Schlüsselqualifikation. Für Notärzte mit hohem Erfahrungsgrad im Atemwegsmanagement sind...  相似文献   
59.
60.
It was an honor for me to present the 2014 G. Heiner Sell Memorial Lecture at the annual American Spinal Injury Association (ASIA) meeting in San Antonio. For this purpose, I provided a comprehensive review of the scope of research targeting discovery and translational and clinical investigations into spinal cord injury (SCI) research. Indeed, these are exciting times in the area of spinal cord research and clinical initiatives. Many laboratories and clinical programs throughout the world are publishing data related to the pathophysiology of SCI and new strategies for protecting and promoting recovery in both animal models and humans. For this lecture, several topics were discussed including neuroprotective and reparative strategies, neurorehabilitation, quality of life issues, and future directions. In the area of neuroprotection, pathophysiological events that may be targeted with therapeutic strategies, including pharmacological and targeted temperature management were reviewed. For reparative approaches, the importance of both intrinsic and extrinsic mechanisms of axonal regeneration was highlighted. Various cell therapies currently being tested in preclinical and clinical arenas were reviewed as well as ongoing US Food and Drug Administration approved trials for SCI patients. Neurorehabilitation is an evolving research field with locomotive training strategies, electrical stimulation, and brain-machine interface programs targeting various types of SCI. The importance of testing combination approaches including neuroprotective, reparative, and rehabilitative strategies to maximize recovery mechanisms was therefore emphasized. Finally, quality of life issues that affect thousands of individuals living with paralysis were also presented. Future directions and specific obstacles that require attention as we continue to move the SCI field forward were discussed.  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