全文获取类型
收费全文 | 1765612篇 |
免费 | 136030篇 |
国内免费 | 6710篇 |
专业分类
耳鼻咽喉 | 22425篇 |
儿科学 | 56897篇 |
妇产科学 | 46779篇 |
基础医学 | 259152篇 |
口腔科学 | 46776篇 |
临床医学 | 160667篇 |
内科学 | 351802篇 |
皮肤病学 | 41587篇 |
神经病学 | 137988篇 |
特种医学 | 71412篇 |
外国民族医学 | 323篇 |
外科学 | 273276篇 |
综合类 | 37813篇 |
现状与发展 | 4篇 |
一般理论 | 516篇 |
预防医学 | 138978篇 |
眼科学 | 38169篇 |
药学 | 127539篇 |
6篇 | |
中国医学 | 3157篇 |
肿瘤学 | 93086篇 |
出版年
2018年 | 17984篇 |
2016年 | 16652篇 |
2015年 | 18556篇 |
2014年 | 25626篇 |
2013年 | 38272篇 |
2012年 | 48942篇 |
2011年 | 53122篇 |
2010年 | 32492篇 |
2009年 | 31071篇 |
2008年 | 49247篇 |
2007年 | 53112篇 |
2006年 | 53611篇 |
2005年 | 51791篇 |
2004年 | 49957篇 |
2003年 | 48433篇 |
2002年 | 46192篇 |
2001年 | 82883篇 |
2000年 | 85110篇 |
1999年 | 70979篇 |
1998年 | 20886篇 |
1997年 | 18499篇 |
1996年 | 19442篇 |
1995年 | 19384篇 |
1994年 | 17967篇 |
1993年 | 16968篇 |
1992年 | 58154篇 |
1991年 | 58305篇 |
1990年 | 56523篇 |
1989年 | 54331篇 |
1988年 | 50206篇 |
1987年 | 49590篇 |
1986年 | 46510篇 |
1985年 | 44871篇 |
1984年 | 33992篇 |
1983年 | 28676篇 |
1982年 | 17248篇 |
1981年 | 15522篇 |
1980年 | 14701篇 |
1979年 | 30909篇 |
1978年 | 22346篇 |
1977年 | 18627篇 |
1976年 | 17795篇 |
1975年 | 19336篇 |
1974年 | 22466篇 |
1973年 | 21510篇 |
1972年 | 19866篇 |
1971年 | 18471篇 |
1970年 | 17052篇 |
1969年 | 15936篇 |
1968年 | 14909篇 |
排序方式: 共有10000条查询结果,搜索用时 562 毫秒
21.
Microbial co-infections are another primary concern in patients with coronavirus disease 2019 (COVID-19), yet it is an untouched area among researchers. Preliminary data and systematic reviews only show the type of pathogens responsible for that, but its pathophysiology is still unknown. Studies show that these microbial co-infections are hospital-acquired/nosocomial infections, and patients admitted to intensive care units with invasive mechanical ventilation are highly susceptible to it. Patients with COVID-19 had elevated inflammatory cytokines and a weakened cell-mediated immune response, with lower CD4+ T and CD8+ T cell counts, indicating vulnerability to various co-infections. Despite this, there are only a few studies that recommend the management of co-infections. 相似文献
22.
23.
Joshua J. Bear Heidi E. Kirsch Brian D. Berman Kevin E. Chapman Jason R. Tregellas 《Epileptic Disord》2020,22(3):291-299
Aims. Functional connectivity is providing new insights into the network nature of epilepsy with growing clinical applications. Our objective was to validate a novel magnetoencephalography‐based method to non‐invasively measure the epileptic network. Methods. We retrospectively identified pediatric and adult patients with refractory focal epilepsy who underwent pre‐surgical magnetoencephalography with subsequent intracranial electrographic monitoring. Magnetoencephalography tracings were visually reviewed, and interictal epileptiform discharges (“spikes”) were individually marked. We then evaluated differences in whole‐brain connectivity during brief epochs preceding the spikes and during the spikes using the Network‐Based Statistic to test differences at the network level. Results. In six patients with statistically‐significant network differences, we observed substantial overlap between the spike‐associated networks and electrographically active areas identified during intracranial monitoring (the spike‐associated network was 78% and 83% sensitive for intracranial electroencephalography‐defined regions in the irritative and seizure onset zones, respectively). Conclusion. These findings support the neurobiological validity of the spike‐associated network method. Assessment of spike‐associated networks has the potential to improve surgical planning in epilepsy surgery patients by identifying components of the epileptic network prior to implantation. 相似文献
24.
25.
Breanne E. Kunstler Jill L. Cook Joanne L. Kemp Paul D. O’Halloran Caroline F. Finch 《Journal of Science and Medicine in Sport》2019,22(1):2-10
Objectives
To determine: (i) the behaviour change techniques used by a sample of Australian physiotherapists to promote non-treatment physical activity; and (ii) whether those behaviour change techniques are different to the techniques used to encourage adherence to rehabilitation exercises.Design
Cross-sectional survey.Method
An online self-report survey was advertised to private practice and outpatient physiotherapists treating patients with musculoskeletal conditions. The use of 50 behaviour change techniques were measured using five-point Likert-type scale questions.Results
Four-hundred and eighty-six physiotherapists responded to the survey, with 216 surveys fully completed. Most respondents (85.1%) promoted non-treatment physical activity often or all of the time. Respondents frequently used 29 behaviour change techniques to promote non-treatment physical activity or encourage adherence to rehabilitation exercises. A similar number of behaviour change techniques was frequently used to encourage adherence to rehabilitation exercises (n = 28) and promote non-treatment physical activity (n = 26). Half of the behaviour change techniques included in the survey were frequently used for both promoting non-treatment physical activity and encouraging adherence to rehabilitation exercises (n = 25). Graded tasks was the most, and punishment was the least, frequently reported technique used to promote non-treatment physical activity and encourage adherence to rehabilitation exercises.Conclusions
Respondents reported using similar behaviour change techniques to promote non-treatment physical activity and encourage adherence to rehabilitation exercises. The variability in behaviour change technique use suggests the behaviour the physiotherapist is promoting influences their behaviour change technique choice. Including the frequently-used behaviour change techniques in non-treatment physical activity promotion interventions might improve their efficacy. 相似文献26.
27.
28.
29.
Balta Sabah Emirtekin Emrah Kircaburun Kagan Griffiths Mark D. 《International journal of mental health and addiction》2020,18(3):628-639
International Journal of Mental Health and Addiction - One of the relatively new negative consequences of smartphone use is “phubbing” (snubbing someone while an individual checks their... 相似文献
30.