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   1177篇
  免费   80篇
  国内免费   22篇
耳鼻咽喉   1篇
儿科学   144篇
妇产科学   26篇
基础医学   146篇
口腔科学   14篇
临床医学   103篇
内科学   217篇
皮肤病学   14篇
神经病学   117篇
特种医学   86篇
外国民族医学   1篇
外科学   157篇
综合类   28篇
预防医学   82篇
眼科学   3篇
药学   88篇
中国医学   1篇
肿瘤学   51篇
  2023年   5篇
  2022年   6篇
  2021年   7篇
  2020年   11篇
  2019年   19篇
  2018年   20篇
  2017年   14篇
  2016年   22篇
  2015年   19篇
  2014年   25篇
  2013年   34篇
  2012年   51篇
  2011年   43篇
  2010年   27篇
  2009年   31篇
  2008年   44篇
  2007年   43篇
  2006年   57篇
  2005年   52篇
  2004年   49篇
  2003年   46篇
  2002年   43篇
  2001年   41篇
  2000年   34篇
  1999年   36篇
  1998年   26篇
  1997年   30篇
  1996年   21篇
  1995年   16篇
  1994年   18篇
  1993年   23篇
  1992年   29篇
  1991年   30篇
  1990年   33篇
  1989年   31篇
  1988年   27篇
  1987年   25篇
  1986年   22篇
  1985年   25篇
  1984年   17篇
  1983年   20篇
  1982年   13篇
  1979年   8篇
  1977年   7篇
  1975年   9篇
  1974年   6篇
  1973年   8篇
  1970年   5篇
  1969年   4篇
  1968年   6篇
排序方式: 共有1279条查询结果,搜索用时 11 毫秒
21.
Dobrava-Belgrade virus (DOBV) is a human pathogen that has evolved in, and is hosted by, mice of several species of the genus Apodemus. We propose a subdivision of the species Dobrava-Belgrade virus into four related genotypes – Dobrava, Kurkino, Saaremaa, and Sochi – that show characteristic differences in their phylogeny, specific host reservoirs, geographical distribution, and pathogenicity for humans.  相似文献   
22.
Parameterization of the ST-segment is used as a tool for risk stratification for patients to suffer from ventricular tachycardia. This parameterization is performed in terms of Principal Component Analysis (PCA) applied on multichannel magnetocardiographic (MCG) recordings. 55-channel MCG was recorded from 14 normal persons, 10 patients with CHD, 14 patients with MI, and six patients with VT. We found a significantly (p?<?0.05) lower PCA-score in patients with MI compared to normals. The lowest PCA-score was found in VT patients. Significant differences can be found between VT patients and normals and also between VT patients and CHD patients.  相似文献   
23.
The threat posed by emerging and re-emerging communicable diseases and, more recently, by the intentional release of infectious agents in a susceptible population, has been receiving considerable attention at the national and international levels. Public health efforts to strengthen disease detection, surveillance and control have been intensified. However, clinicians and clinical microbiology laboratories play an important role in the early detection of disease, the identification of the putative agent, and notification of the appropriate authorities. To be effective in this role, laboratories must be specially prepared to handle viral agents safely, and need, among other things, the appropriate rapid and sensitive diagnostic tests. In 1998 the European Network for Diagnostics of 'Imported' Viral Diseases (ENIVD) was established. ENIVD presently comprises, as permanent members, 44 expert laboratories in 21 European Union (EU) member states and 4 non-EU countries and is one of the networks on infectious diseases funded by the European Commission. ENIVD fulfils many of the important tasks required for the surveillance and control of imported, rare and emerging viral infections such as the exchange of expertise and the organisation of external quality assurance (EQA) programmes, both of which are needed to improve diagnostics. Here, we summarise the data generated by recent EQA activities focussed on the diagnostics of infections with hantavirus, dengue virus, filovirus, Lassa virus, orthopox virus and the SARS-coronavirus (SARS-CoV). These were carried out between 1999 and 2004 and involved 93 laboratories from 41 countries, including laboratories from additional countries outside of Europe. Particularly the EU-candidate countries and Eastern neighbouring countries will be invited to join the network in the near future. A public website is available at http://www.enivd.de.  相似文献   
24.
These guidelines, written for clinicians, contains evidence-based recommendations for the prevention of hospital acquired infections Hospital acquired infections are a major cause of mortality and morbidity and provide challenge to clinicians. Measures of infection control include identifying patients at risk of nosocomial infections, observing hand hygiene, following standard precautions to reduce transmission and strategies to reduce VAP, CR-BSI, CAUTI. Environmental factors and architectural lay out also need to be emphasized upon. Infection prevention in special subsets of patients - burns patients, include identifying sources of organism, identification of organisms, isolation if required, antibiotic prophylaxis to be used selectively, early removal of necrotic tissue, prevention of tetanus, early nutrition and surveillance. Immunodeficient and Transplant recipients are at a higher risk of opportunistic infections. The post tranplant timetable is divided into three time periods for determining risk of infections. Room ventilation, cleaning and decontamination, protective clothing with care regarding food requires special consideration. Monitoring and Surveillance are prioritized depending upon the needs. Designated infection control teams should supervise the process and help in collection and compilation of data. Antibiotic Stewardship Recommendations include constituting a team, close coordination between teams, audit, formulary restriction, de-escalation, optimizing dosing, active use of information technology among other measure. The recommendations in these guidelines are intended to support, and not replace, good clinical judgment. The recommendations are rated by a letter that indicates the strength of the recommendation and a Roman numeral that indicates the quality of evidence supporting the recommendation, so that readers can ascertain how best to apply the recommendations in their practice environments.  相似文献   
25.
26.
L‐asparaginase is an important drug in the treatment of childhood acute lymphoblastic leukaemia (ALL). Treatment is associated with several toxicities, including acute pancreatitis. Clinical course, presentation, re‐exposure to L‐asparginase after pancreatitis and risk of recurrent pancreatitis within an asparaginase‐intensive protocol has been poorly reported. Children (1–17 years) on the ongoing Nordic Society of Paediatric Haematology and Oncology (NOPHO) ALL2008 protocol with asparaginase‐associated pancreatitis (AAP) diagnosed between 2008 and 2012 were identified through the online NOPHO ALL toxicity registry. NOPHO ALL2008 includes eight or 15 doses of intramuscular pegylated L‐asparginase (PEG‐asparaginase) 1000 iu/m2/dose at 2–6 weeks intervals, with a total of 30 weeks of exposure to PEG‐asparaginase (clinicaltrials.gov no: NCT00819351). Of 786 children, 45 were diagnosed with AAP with a cumulative risk of AAP of 5·9%. AAP occurred after a median of five doses (range 1–13), and 11 d (median) from the latest administration of PEG‐Asparaginase. Thirteen patients developed pseudocysts (30%) and 11 patients developed necrosis (25%). One patient died from pancreatitis. Twelve AAP patients were re‐exposed to L‐asparginase, two of whom developed mild AAP once more, after four and six doses respectively. In conclusion, re‐exposure to PEG‐asparaginase in ALL patients with mild AAP seems safe.  相似文献   
27.
28.

This study investigates the feasibility and impact of the ParentingWell Learning Collaborative (PWLC) model in supporting mental health practitioners in implementing the family-focused ParentingWell practice approach with adults with mental illness. An exploratory design and qualitative methods were employed. Practitioners (n?=?29) participated in in-person orientation, training and debriefing sessions; virtual coaching sessions; and via an interactive online hub. Researchers obtained data on participant engagement and satisfaction, and participants’ reports of use, helpfulness, intention to use and impact. Participants were engaged in and highly satisfied with the PWLC. They deployed PWLC skills, tools and resources with parents. Evidence of impact was provided at the personal, practice and organizational levels. This study provides preliminary support for the feasibility and impact of the PWLC. Clear specification of a theoretically-based training model for practitioners is an essential step in adapting, implementing and testing interventions in new contexts .

  相似文献   
29.
30.
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