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   1415篇
  免费   218篇
  国内免费   29篇
耳鼻咽喉   5篇
儿科学   55篇
妇产科学   84篇
基础医学   110篇
口腔科学   64篇
临床医学   177篇
内科学   265篇
皮肤病学   59篇
神经病学   88篇
特种医学   33篇
外科学   231篇
综合类   108篇
现状与发展   1篇
一般理论   2篇
预防医学   100篇
眼科学   23篇
药学   61篇
中国医学   99篇
肿瘤学   97篇
  2024年   22篇
  2023年   71篇
  2022年   180篇
  2021年   190篇
  2020年   206篇
  2019年   118篇
  2018年   105篇
  2017年   59篇
  2016年   78篇
  2015年   41篇
  2014年   76篇
  2013年   80篇
  2012年   55篇
  2011年   41篇
  2010年   44篇
  2009年   41篇
  2008年   34篇
  2007年   36篇
  2006年   25篇
  2005年   19篇
  2004年   24篇
  2003年   15篇
  2002年   10篇
  2001年   15篇
  2000年   13篇
  1999年   12篇
  1998年   9篇
  1997年   4篇
  1996年   13篇
  1995年   11篇
  1994年   1篇
  1993年   3篇
  1992年   3篇
  1991年   2篇
  1989年   1篇
  1988年   1篇
  1986年   2篇
  1985年   1篇
  1981年   1篇
排序方式: 共有1662条查询结果,搜索用时 15 毫秒
21.
小肠疾病是消化系统疾病诊治难点之一,检查技术有限,严重制约了儿童消化道疾病的诊疗水平。随着小肠镜在儿科临床应用的推广与小肠镜设备和附件的优化,小肠镜技术为儿科消化道诊疗提供了新的手段,但临床操作规范化和镜下治疗面临诸多问题和挑战。为规范儿童小肠镜诊疗技术及提高小肠疾病的诊疗水平,中华医学会儿科学分会消化学组牵头,组织专家充分讨论,并参考儿童小肠镜临床应用的最新进展,制定了儿童小肠镜临床应用管理专家共识。  相似文献   
22.
【摘要】 湿包疗法治疗特应性皮炎安全有效,但如何合理、有效、安全地使用已经成为临床工作中受关注的问题。为此,我国皮炎湿疹领域部分专家依据国内外研究数据和临床经验,结合中国患者的特点,在深入讨论的基础上制定本共识,涉及湿包疗法的作用机制、适应证和禁忌证、治疗方法、疗效与安全性、特殊人群以及家庭湿包疗法等方面,为临床医生提供具体的指导意见。  相似文献   
23.
BackgroundA leukocyte esterase (LE) test is inexpensive and provides real-time information about patients suspected of periprosthetic joint infections (PJIs). The 2018 International Consensus Meeting (ICM) recommends it as a diagnostic tool with a 2+ cutoff. There is still a lack of data revealing LE utility versus the ICM 2018 criteria for PJI.MethodsThis is a retrospective study of patients who underwent revision total hip and total knee arthroplasty at a single institution between March 2009 and December 2019. All patients underwent joint aspiration before the arthrotomy, and the LE strip test was performed on aspirated joint fluid. PJI was defined using the 2018 ICM criteria.ResultsAs per the 2018 ICM criteria, 78 patients were diagnosed with chronic PJI and 181 were not infected. An LE test with a cutoff of 1+ had a sensitivity of 0.744, a specificity of 0.906, a positive predictive value of 0.773, an accuracy of 0.825 (95% confidence interval 0.772-0.878), and a negative predictive value of 0.891. The positive likelihood ratio (LR+) was 7.917. Using an LE cutoff of 2 + had a sensitivity of 0.513, a specificity of 1.000, and an accuracy of 0.756 (95% confidence interval—0.812).ConclusionLE is a rapid and inexpensive test which can be performed at the bedside. Its performance is valuable as per ICM criteria. Based on the findings of this study and the given cohort, we suggest using the cutoff of LE1+ (result = negative or trace) as a point of care test to exclude infection, whereas LE at 2 + threshold has near absolute specificity for the diagnosis.  相似文献   
24.
25.
Defining an exacerbation of pulmonary disease in cystic fibrosis   总被引:2,自引:0,他引:2  
Despite the importance of pulmonary exacerbations in CF in both clinical and research settings, both published evidence and consensus are lacking concerning the criteria used to define an exacerbation. The use of hospitalization as a surrogate measure presupposes uniformity among clinicians in diagnosis and treatment of exacerbations. Our aims were to evaluate consensus among clinicians about the variables considered helpful in diagnosing an exacerbation requiring treatment. A comprehensive list of symptoms, signs, and investigations used to define exacerbations was compiled from published trials. A written self-administered questionnaire included the list in age-appropriate groups to survey opinion about the helpfulness of each item, and the estimated proportion of patients admitted within a month of diagnosis of an exacerbation. This was sent to all clinicians managing CF patients in Australia. There were replies from 59/91 clinicians (65%), 41/60 (68%) from those managing children and 18/31 (58%) from those managing adults. Responses of those managing children and adults differed for 7/32 variables (Mann-Whitney test, P < 0.05). Clinic grouping did not show greater consensus among responses of pediatricians (Kruskal-Wallis test, P = 0.362). Consensus, >74% or <26% of respondents rating a variable helpful/very helpful, was found in only 50% of variables listed. Estimated admission rate within a month of diagnosis was 61% (30-100%) for those managing adults and 48% %5-100%) for pediatricians. A lack of consensus was found among clinicians managing CF about the variables considered in diagnosing an exacerbation. The estimated proportion admitted within a month of diagnosis was very variable. This demonstrated inhomogeneity in approach to diagnosis and management of an exacerbation suggests a significant heterogeneity of clinical care.  相似文献   
26.
27.
28.
29.
30.
The role of human papillomavirus (HPV) infection in the development of esophageal squamous cell carcinoma is well established; however, there are few reports on the role of HPV in esophageal adenocarcinoma. To evaluate the putative role of HPV infection in esophageal adenocarcinoma, 57 formalin‐fixed, paraffin‐embedded esophageal adenocarcinoma specimens were collected from four hospitals in Shanghai and Anyang, China, between 1999 and 2008. HPV DNA was analyzed using PCR with multiple sets of consensus primers for HPV, GP5+/6+, CPI/CPIIG, SPF10, pU‐1M/pU2R, and pU31B/pU2R. Glyceraldehyde‐3‐phosphate dehydrogenase (GAPDH), the internal control, was amplified successfully in all 57 specimens. However, HPV amplification was not detected in any specimens with any of the consensus primer sets used. The present study indicates that HPV infection is not likely to be a major factor in the etiology of esophageal adenocarcinoma in the Chinese population. J. Med. Virol. 85: 1053–1057, 2013. © 2013 Wiley Periodicals, Inc.  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