收费全文 | 42766篇 |
免费 | 5560篇 |
国内免费 | 425篇 |
耳鼻咽喉 | 999篇 |
儿科学 | 1417篇 |
妇产科学 | 939篇 |
基础医学 | 4060篇 |
口腔科学 | 971篇 |
临床医学 | 4723篇 |
内科学 | 9293篇 |
皮肤病学 | 1126篇 |
神经病学 | 3711篇 |
特种医学 | 1579篇 |
外科学 | 8072篇 |
综合类 | 852篇 |
现状与发展 | 2篇 |
一般理论 | 15篇 |
预防医学 | 2889篇 |
眼科学 | 1674篇 |
药学 | 2472篇 |
2篇 | |
中国医学 | 135篇 |
肿瘤学 | 3820篇 |
2023年 | 702篇 |
2022年 | 444篇 |
2021年 | 1051篇 |
2020年 | 1207篇 |
2019年 | 928篇 |
2018年 | 1488篇 |
2017年 | 1211篇 |
2016年 | 1461篇 |
2015年 | 1482篇 |
2014年 | 2010篇 |
2013年 | 2303篇 |
2012年 | 2412篇 |
2011年 | 2404篇 |
2010年 | 1858篇 |
2009年 | 1928篇 |
2008年 | 2176篇 |
2007年 | 2021篇 |
2006年 | 1996篇 |
2005年 | 1786篇 |
2004年 | 1740篇 |
2003年 | 1538篇 |
2002年 | 1375篇 |
2001年 | 1357篇 |
2000年 | 1185篇 |
1999年 | 1092篇 |
1998年 | 568篇 |
1997年 | 514篇 |
1996年 | 553篇 |
1995年 | 507篇 |
1994年 | 380篇 |
1993年 | 308篇 |
1992年 | 664篇 |
1991年 | 628篇 |
1990年 | 524篇 |
1989年 | 537篇 |
1988年 | 470篇 |
1987年 | 421篇 |
1986年 | 424篇 |
1985年 | 422篇 |
1984年 | 314篇 |
1983年 | 282篇 |
1982年 | 224篇 |
1981年 | 160篇 |
1980年 | 167篇 |
1979年 | 203篇 |
1978年 | 144篇 |
1977年 | 154篇 |
1976年 | 105篇 |
1975年 | 109篇 |
1974年 | 115篇 |
![点击此处可从《Emergency medicine Australasia : EMA》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Objective
We aimed to investigate the effect of known heart disease on post‐out‐of‐hospital cardiac arrest (OHCA) survival outcomes, and its association with factors influencing survival.Methods
This was an observational, retrospective study involving an OHCA database from seven Asian countries in 2009–2012. Heart disease was defined as a documented diagnosis of coronary artery disease or congenital heart disease. Patients with non‐traumatic arrests for whom resuscitation was attempted and with known medical histories were included. Differences in demographics, arrest characteristics and survival between patients with and without known heart disease were analysed. Multivariate logistic regression was performed to identify factors influencing survival to discharge.Results
Of 19 044 eligible patients, 5687 had known heart disease. They were older (77 vs 72 years) and had more comorbidities like diabetes (40.9 vs 21.8%), hypertension (60.6 vs 36.0%) and previous stroke (15.2 vs 10.1%). However, they were not more likely to receive bystander cardiopulmonary resuscitation (P = 0.205) or automated external defibrillation (P = 0.980). On univariate analysis, known heart disease was associated with increased survival (unadjusted odds ratio 1.16, 95% confidence interval 1.03–1.30). However, on multivariate analysis, heart disease predicted poorer survival (adjusted odds ratio 0.76, 95% confidence interval 0.58–1.00). Other factors influencing survival corresponded with previous reports.Conclusions
Known heart disease independently predicted poorer post‐OHCA survival. This study may provide information to guide future prospective studies specifically looking at family education for patients with heart disease and the effect on OHCA outcomes. 相似文献- Implications for Rehabilitation
Compared to typically-developing children, children with autism spectrum disorders have delayed development of gesture comprehension and production.
Robot-based intervention program was developed to teach children with autism spectrum disorders recognition (Phase I) and production (Phase II) of eight pantomime gestures that expressed feelings and needs.
Children in the intervention group (but not in the wait-list control group) were able to recognize more gestures in both trained and untrained scenarios and generalize the acquired gestural recognition skills to human-to-human interaction.
Similar findings were reported for gestural production except that there was no strong evidence showing children in the intervention group could produce gestures accurately in human-to-human interaction.
![点击此处可从《Journal of evaluation in clinical practice》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Areas covered: In this review, the authors summarized and discussed the current and future technologies in molecular diagnosis as well as the biomarkers developed for HIV infection.
Expert Commentary: A simple and rapid detection of viral load is important for patients and doctors to monitor HIV progression and antiretroviral treatment efficiency. In the near future, it is expected that new technologies such as digital PCR and CRISPR-based technology will play more important role in HIV detection and patient management. 相似文献
![点击此处可从《Clinical physiology and functional imaging》网站下载免费的PDF全文](/ch/ext_images/free.gif)
![点击此处可从《Pain practice》网站下载免费的PDF全文](/ch/ext_images/free.gif)