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   4934742篇
  免费   389003篇
  国内免费   15589篇
耳鼻咽喉   69177篇
儿科学   158172篇
妇产科学   130101篇
基础医学   741093篇
口腔科学   137211篇
临床医学   454308篇
内科学   901698篇
皮肤病学   117081篇
神经病学   413599篇
特种医学   193456篇
外国民族医学   968篇
外科学   740261篇
综合类   138985篇
现状与发展   24篇
一般理论   2809篇
预防医学   413096篇
眼科学   115800篇
药学   351841篇
  26篇
中国医学   12985篇
肿瘤学   246643篇
  2021年   56869篇
  2019年   59313篇
  2018年   76138篇
  2017年   58395篇
  2016年   64763篇
  2015年   77241篇
  2014年   111687篇
  2013年   177367篇
  2012年   140186篇
  2011年   148088篇
  2010年   130933篇
  2009年   130941篇
  2008年   133429篇
  2007年   143269篇
  2006年   150845篇
  2005年   145068篇
  2004年   145883篇
  2003年   135737篇
  2002年   124356篇
  2001年   197237篇
  2000年   194200篇
  1999年   174290篇
  1998年   75865篇
  1997年   70581篇
  1996年   68762篇
  1995年   64340篇
  1994年   58177篇
  1993年   53999篇
  1992年   128560篇
  1991年   123375篇
  1990年   118823篇
  1989年   115368篇
  1988年   106266篇
  1987年   104314篇
  1986年   98413篇
  1985年   95829篇
  1984年   77784篇
  1983年   68455篇
  1982年   51624篇
  1981年   47709篇
  1980年   44728篇
  1979年   67686篇
  1978年   53042篇
  1977年   46609篇
  1976年   43238篇
  1975年   44061篇
  1974年   48990篇
  1973年   46930篇
  1972年   43927篇
  1971年   40618篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Lucio phenomenon is an atypical reaction of leprosy, characterized by vasculitic lesions that can mimic antiphospholipid syndrome (APS) clinically. Distinguishing the two can be difficult as antiphospholipid autoantibodies may be present in patients with leprosy. We report on a 32‐year‐old female patient presenting with a sudden onset of fever, hemorrhagic bullae, and skin necrosis on her lower legs. She was treated for APS due to the presence of antiphospholipid antibodies but had an inadequate response. A skin biopsy revealed thrombotic vasculopathy and necrotizing vasculitis associated with aggregation of foam cells in the perivascular area and subcutis, with acid‐fast bacilli in the histiocytes and blood vessel walls. Direct immunofluorescence showed IgM, C3, and fibrinogen deposition in the superficial and deep dermal blood vessels. The pathology confirmed the diagnosis of Lucio phenomenon, and appropriate therapy was given. It is essential to evaluate the patient comprehensively, including clinical, serological, and pathological aspects, to obtain the correct diagnosis.  相似文献   
992.
993.
This paper reviews the published literature on a group of developmental disorders of the retina and retinal pigment epithelium which result in focal abnormalities in one or both eyes. They are often asymptomatic, found on routine examination and are generally non-progressive. Some are associated with other systemic abnormalities.Subject terms: Retinal diseases, Eye abnormalities  相似文献   
994.
995.
996.
997.
Objective: A multidisciplinary vocational rehabilitation programme, the Vocational Enablement Protocol (VEP) was developed to address the specific needs of employees with hearing difficulties. In the current study we evaluated the process of implementing the VEP in audiologic care among employees with hearing impairment. Design: In conjunction with a randomized controlled trial, we collected and analysed data on seven process parameters: recruitment, reach, fidelity, dose delivered, dose received and implemented, satisfaction, and perceived benefit. Study sample: Sixty-six employees with hearing impairment participated in the VEP. The multidisciplinary team providing the VEP comprised six professionals. Results: The professionals performed the VEP according to the protocol. Of the recommendations delivered by the professionals, 31% were perceived as implemented by the employees. Compliance rate was highest for hearing-aid uptake (51%). Both employees and professionals were highly satisfied with the VEP. Participants rated good perceived benefit from it. Conclusions: Our results indicate that the VEP could be a useful treatment for employees with hearing difficulties from a process evaluation perspective. Implementation research in the audiological setting should be encouraged in order to further provide insight into parameters facilitating or hindering successful implementation of an intervention and to improve its quality and efficacy.  相似文献   
998.
999.
1000.
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