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   69165篇
  免费   5104篇
  国内免费   1694篇
耳鼻咽喉   306篇
儿科学   1116篇
妇产科学   1229篇
基础医学   5760篇
口腔科学   1026篇
临床医学   7172篇
内科学   12140篇
皮肤病学   691篇
神经病学   1770篇
特种医学   962篇
外国民族医学   11篇
外科学   3097篇
综合类   9566篇
现状与发展   9篇
预防医学   7816篇
眼科学   334篇
药学   15277篇
  20篇
中国医学   2030篇
肿瘤学   5631篇
  2023年   860篇
  2022年   1570篇
  2021年   2630篇
  2020年   2203篇
  2019年   2144篇
  2018年   2197篇
  2017年   2130篇
  2016年   2418篇
  2015年   2718篇
  2014年   4927篇
  2013年   5971篇
  2012年   4785篇
  2011年   5268篇
  2010年   3974篇
  2009年   3793篇
  2008年   3908篇
  2007年   3687篇
  2006年   3135篇
  2005年   2706篇
  2004年   2205篇
  2003年   1740篇
  2002年   1391篇
  2001年   1262篇
  2000年   1039篇
  1999年   935篇
  1998年   670篇
  1997年   648篇
  1996年   528篇
  1995年   488篇
  1994年   484篇
  1993年   366篇
  1992年   348篇
  1991年   272篇
  1990年   223篇
  1989年   205篇
  1988年   183篇
  1987年   195篇
  1986年   155篇
  1985年   220篇
  1984年   194篇
  1983年   111篇
  1982年   141篇
  1981年   109篇
  1980年   113篇
  1979年   87篇
  1978年   83篇
  1977年   88篇
  1976年   95篇
  1975年   91篇
  1974年   57篇
排序方式: 共有10000条查询结果,搜索用时 27 毫秒
31.
32.
BackgroundAdverse drug reactions (ADRs) and adverse drug events (ADEs) in older people contribute to a significant proportion of hospital admissions and are common following discharge. Effective interventions are therefore required to combat the growing burden of preventable ADRs. The Prediction of Hospitalisation due to Adverse Drug Reactions in Elderly Community Dwelling Patients (PADR-EC) score is a validated risk score developed to assess the risk of ADRs in people aged 65 years and older and has the potential to be utilised as part of an intervention to reduce ADRs.ObjectivesThis trial was designed to investigate the effectiveness of an intervention to reduce ADR incidence in older people and to obtain further information about ADRs and ADEs in the 12–24 months following hospital discharge.MethodsThe study is an open-label randomised-controlled trial to be conducted at the Royal Hobart Hospital, a 500-bed public hospital in Tasmania, Australia. Community-dwelling patients aged 65 years and older with an unplanned overnight admission to a general medical ward will be recruited. Following admission, the PADR-EC ADR score will be calculated by a research pharmacist, with the risk communicated to clinicians and discussed with participants. Following discharge, nominated general practitioners and community pharmacists will receive the risk score and related medication management advice to guide their ongoing care of the patient. Follow-up with participants will occur at 3 and 12 and 18 and 24 months to identify ADRs and ADEs. The primary outcome is moderate-severe ADRs at 12 months post-discharge, and will be analysed using the cumulative incidence proportion, survival analysis and Poisson regression.SummaryIt is hypothesised that the trial will reduce ADRs and ADEs in the intervention population. The study will also provide valuable data on post-discharge ADRs and ADEs up to 24 months post-discharge.  相似文献   
33.
IntroductionRapid diagnostic tests have been developed recently for rapid species or resistance genes identification, offering the potential to improve the selection of appropriate antibiotics. The newly developed FilmArray Blood Culture Identification 2 (BCID2) panel, which can identify more species and resistance genes, such as extended-spectrum beta-lactamase, is expected to make an impact on antimicrobial practice.MethodsThe consecutive 50 inpatients with Gram-negative bacilli bacteremia were enrolled to this retrospective single-center study. In addition to the existing FilmArray Blood Culture Identification (BCID) panel, we have implemented BCID2 panel for positive blood culture. The sensitivity and specificity of BCID and BCID2 panel were respectively calculated, and a simulation study of time to effective, optimal and de-escalation therapy was performed based on BCID or BCID2 result.ResultsA total of 52 Gram-negative organisms in 50 patients were identified from blood cultures. Of these, 45 (87%) organisms were detected by BCID2 panel, which was more than BCID panel (41 organisms, 79%). BCID2 panel detected 5 CTX-M genes, which were concordant with conventional method. The time to effective therapy did not differ between BCID arm and BCID2 arm; however, the median time to optimal therapy (34 h in BCID arm and 26 h in BCID2 arm, P = 0.0007) and the median time to de-escalation therapy (42 h in BCID arm and 22 h in BCID2 arm, P = 0.0005) were significantly shortened.ConclusionsThis simulation study of BCID2 panel showed high sensitivity and specificity, and the potential impact on shortening the time to optimal and de-escalation therapy.  相似文献   
34.
 异质性耐药是一种特殊的细菌耐药类型,常表现为同一克隆来源的不同细菌亚群对某种抗菌药物表现出不一致的耐药特征,大多数亚群对某种抗菌药物敏感,而少部分亚群对其耐药或高度耐药。异质性耐药分离株常会导致特定抗菌药物抗感染治疗失败。针对异质性耐药菌较为深入的研究主要集中于革兰阴性菌,革兰阳性球菌的相关报道较少。近年有研究报道万古霉素、利奈唑胺、苯唑西林等多种类型抗菌药物异质性耐药金黄色葡萄球菌分离株出现,但其实际临床意义尚待进一步评估。此文对金黄色葡萄球菌异质性耐药机制和检测技术最新进展进行综述,为细菌异质性耐药机制研究和新型检测技术研发提供新的思路。  相似文献   
35.
36.
IntroductionAs the American’s Federal Health Insurance Portability and Accountability Act (HIPAA) stated that patients should be allowed to review their medical records, and as information technology is ever more widely used by healthcare professionals and patients, providing patients with online access to their own medical records through a patient portal is becoming increasingly popular. Previous research has been done regarding the impact on the quality and safety of patients’ care, rather than explicitly on medication safety, when providing those patients with access to their electronic health records (EHRs).AimThis narrative review aims to summarise the results from previous studies on the impact on medication management safety concepts of adult patients accessing information contained in their own EHRs.ResultA total of 24 studies were included in this review. The most two commonly studied measures of safety in medication management were: (a) medication adherence and (b) patient-reported experience. Other measures, such as: discrepancies, medication errors, appropriateness and Adverse Drug Events (ADEs) were the least studied.ConclusionThe results suggest that providing patients with access to their EHRs can improve medication management safety. Patients pointed out improvements to the safety of their medications and perceived stronger medication control. The data from these studies lay the foundation for future research.  相似文献   
37.
ObjectivesTo measure the effect of a structured online training programme on improving the knowledge, attitude, confidence, and skills of university students to deliver peer-led addiction counselling to young drug abusers.MethodsA structured training programme was designed for university students with a background in health-related disciplines. Pre- and post-training evaluations were conducted for 245 university students with health-related backgrounds who completed the training programme. The participants’ knowledge of and attitudes towards drug abuse and their confidence in delivering addiction counselling were evaluated and compared before and after the training. Counselling skills were assessed using a simulated standardised case.ResultsA paired test indicated that after attending the training programme, the participants’ knowledge of and attitudes towards drug abuse and their confidence in delivering addiction counselling were significantly improved. Most of the trained participants demonstrated satisfactory counselling skills.ConclusionParticipation in a one-day structured addiction training programme significantly improved students’ knowledge of and attitudes towards drug abuse and their confidence and skills to deliver addiction counselling.Practice implicationFuture research should elucidate the implementation of the counselling skills in terms of the counselling outcomes and successful referral. The clients’ health outcomes should be assessed to reflect the peer counsellors’ skills.  相似文献   
38.
39.
40.
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