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   6060篇
  免费   410篇
  国内免费   19篇
耳鼻咽喉   50篇
儿科学   174篇
妇产科学   147篇
基础医学   855篇
口腔科学   83篇
临床医学   626篇
内科学   1322篇
皮肤病学   124篇
神经病学   579篇
特种医学   92篇
外科学   637篇
综合类   56篇
一般理论   3篇
预防医学   816篇
眼科学   92篇
药学   409篇
中国医学   32篇
肿瘤学   392篇
  2024年   12篇
  2023年   88篇
  2022年   136篇
  2021年   276篇
  2020年   162篇
  2019年   223篇
  2018年   234篇
  2017年   168篇
  2016年   144篇
  2015年   204篇
  2014年   231篇
  2013年   338篇
  2012年   520篇
  2011年   479篇
  2010年   303篇
  2009年   255篇
  2008年   396篇
  2007年   360篇
  2006年   352篇
  2005年   344篇
  2004年   311篇
  2003年   255篇
  2002年   247篇
  2001年   39篇
  2000年   27篇
  1999年   51篇
  1998年   39篇
  1997年   19篇
  1996年   28篇
  1995年   27篇
  1994年   19篇
  1993年   19篇
  1992年   25篇
  1991年   28篇
  1990年   22篇
  1989年   15篇
  1988年   12篇
  1987年   7篇
  1986年   9篇
  1984年   5篇
  1983年   7篇
  1982年   5篇
  1980年   4篇
  1979年   4篇
  1977年   3篇
  1976年   9篇
  1975年   3篇
  1974年   6篇
  1973年   4篇
  1971年   4篇
排序方式: 共有6489条查询结果,搜索用时 15 毫秒
51.
52.
Purpose: To survey the opinion of oculoplastic surgeons on the assessment and management of lower eyelid retraction (LLR).

Methods: A web-based survey queried oculoplastic surgeon members of Ojoplast, Spanish and Brazilian Oculoplastic Societies on the management of LLR. The frequency and percentage proportions of the responses were analyzed.

Results: One hundred ninety-six oculoplastic surgeons participated in the survey. The main cause of LLR is post-blepharoplasty (62;31.6%). The most used sign to detect LLR is scleral show. The most common approaches to managing LLR are lateral canthal surgery (164/593;27.6%), autogenous spacers (148/593; 24.9%) and retractor release (131/593;22.1%). The preferred autogenous graft material includes ear cartilage (102/260;39.2%). The majority of surgeons (161/314; 51.3%) recommend massage or steroids injection (80/314;25.5%) for early post-blepharoplasty LLR, while, 54.1% (106/196) of participants suggested waiting for at least six months prior to surgical intervention. Frost suture is used after most LLR surgeries (154/196;91.1%). Incomplete correction is the main complication (111/310;35.8%) of LLR surgery. For mild LLR, 48% of the responders prefer clinical treatment; conversely, severe cases routinely require combined surgical techniques.

Conclusions: Oculoplastic surgeons frequently diagnose LLR based on scleral show. LLR management depends on the cause and severity of lid retraction. Mild cases, in general, receive clinical treatment and severe cases need a combination of surgical techniques and grafts.  相似文献   

53.
Primary cardiac lymphoma is defined as a lymphoma of the heart and pericardium with little or no extracardiac or local involvement such as mediastinal lymph nodes or pleural effusion. Most cases are diagnosed only post mortem (1). If this disease could be diagnosed earlier, therapy with chlorpropamide, doxorubicin, vincristine and prednisone (CHOP) could bring about a remission (2,3,4). Transoesophageal echocardiography with three-dimensional acquisition is a new technique which can allow earlier diagnosis, and facilitate guided transvenous biopsy (5,6). We here report an example of the pre-mortem diagnosis of cardiac lymphoma by these techniques.  相似文献   
54.
OBJECTIVE: To evaluate an intensive training program’s effects on residents’ confidence in their ability in, anticipation of positive outcomes from, and personal commitment to psychosocial behaviors. DESIGN: Controlled randomized study. SETTING: A university- and community-based primary care residency training program. PARTICIPANTS: 26 first-year residents in internal medicine and family practice. INTERVENTION: The residents were randomly assigned to a control group or to one-month intensive training centered on psychosocial skills needed in primary care. MEASUREMENTS: Questionnaires measuring knowledge of psychosocial medicine, and self-confidence in, anticipation of positive outcomes from, and personal commitment to five skill areas: psychological sensitivity, emotional sensitivity, management of somatization, and directive and nondirective facilitation of patient communication. RESULTS: The trained residents expressed higher self-confidence in all five areas of psychosocial skill (p<0.03 for all tests), anticipated more positive outcomes for emotional sensitivity (p=0.05), managing somatization (p=0.03), and nondirectively facilitating patient communication (p=0.02), and were more strongly committed to being emotionally sensitive (p=0.055) and managing somatization (p=0.056), compared with the untrained residents. The trained residents also evidenced more knowledge of psychosocial medicine than did the untrained residents (p<0.001). CONCLUSIONS: Intensive psychosocial training improves residents’ self-confidence in their ability regarding key psychosocial behaviors and increases their knowledge of psychosocial medicine. Training also increases anticipation of positive outcomes from and personal commitment to some, but not all, psychosocial skills. Presented at the annual meeting of the Society of General Internal Medicine, Washington, DC, April 27–29, 1994. Supported by the Fetzer Institute in Kalamazoo, MI.  相似文献   
55.
56.
57.
58.
59.
60.
Variant Creutzfeldt-Jakob disease (vCJD) is a rare, fatal prion disease resulting from transmission to humans of the infectious agent of bovine spongiform encephalopathy. We describe the clinical presentation of a recent case of vCJD in the United States and provide an update on diagnostic testing. The location of this patient’s exposure is less clear than those in the 3 previously reported US cases, but strong evidence indicates that exposure to contaminated beef occurred outside the United States more than a decade before illness onset. This case exemplifies the persistent risk for vCJD acquired in unsuspected geographic locations and highlights the need for continued global surveillance and awareness to prevent further dissemination of vCJD.  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