全文获取类型
收费全文 | 1390968篇 |
免费 | 121092篇 |
国内免费 | 10970篇 |
学科分类
医药卫生 | 1523030篇 |
出版年
2021年 | 11606篇 |
2018年 | 15547篇 |
2017年 | 12667篇 |
2016年 | 14710篇 |
2015年 | 17185篇 |
2014年 | 23549篇 |
2013年 | 32783篇 |
2012年 | 40975篇 |
2011年 | 44011篇 |
2010年 | 27425篇 |
2009年 | 26244篇 |
2008年 | 39574篇 |
2007年 | 41870篇 |
2006年 | 42942篇 |
2005年 | 41503篇 |
2004年 | 38661篇 |
2003年 | 37726篇 |
2002年 | 35386篇 |
2001年 | 67284篇 |
2000年 | 69168篇 |
1999年 | 58083篇 |
1998年 | 17671篇 |
1997年 | 15898篇 |
1996年 | 15883篇 |
1995年 | 16772篇 |
1994年 | 15663篇 |
1993年 | 14452篇 |
1992年 | 47539篇 |
1991年 | 46108篇 |
1990年 | 44290篇 |
1989年 | 42078篇 |
1988年 | 38997篇 |
1987年 | 38270篇 |
1986年 | 36025篇 |
1985年 | 34772篇 |
1984年 | 26413篇 |
1983年 | 22112篇 |
1982年 | 13844篇 |
1981年 | 12436篇 |
1980年 | 11680篇 |
1979年 | 23543篇 |
1978年 | 17031篇 |
1977年 | 14347篇 |
1976年 | 13142篇 |
1975年 | 13697篇 |
1974年 | 16071篇 |
1973年 | 15384篇 |
1972年 | 14170篇 |
1971年 | 13030篇 |
1970年 | 11867篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
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
23.
24.
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25.
26.
27.
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
28.
29.
Samir Gupta MD MDCS AGAF Balambal Bharti MBBS MPH PhD Dennis J. Ahnen MD Daniel D. Buchanan PhD Iona C. Cheng PhD MPH Michelle Cotterchio PhD Jane C. Figueiredo PhD Steven J. Gallinger MD MSc Robert W. Haile DrPH MPH Mark A. Jenkins PhD Noralane M. Lindor MD Finlay A. Macrae MD AGAF Loïc Le Marchand MD PhD Polly A. Newcomb PhD MPH Stephen N. Thibodeau PhD Aung Ko Win MBBS MPH PhD Maria Elena Martinez PhD 《Cancer》2020,126(13):3013-3020
30.
Aliyah Hussein Kiran Sran Imran Ali Janine Woellner Helen Wilcox Stephen D. Marks Helen Jones Chris Callaghan 《Pediatric transplantation》2020,24(4)
Transplant ureteric stent insertion reduces the incidence of MUCs, but it is not known whether routine PSRGU is needed to detect unmasked MUCs. This study evaluated whether routine PSRGU in the pRTR is a useful tool to identify MUCs before they become clinically apparent. A retrospective analysis was undertaken of the clinical outcomes following elective stent removal from pediatric kidney‐only transplant recipients at two London centers between 2012 and 2016. Our policy was to perform PSRGU either routinely or urgently if there were concerning symptoms or biochemical evidence of renal allograft dysfunction. Elective stent removal was performed in 86% (97 of 113 pRTR), and 75 (77%) of whom had routine PSRGU at a median (IQR) of 6 (2‐8) days after stent removal. There were changes to management in 3 (4%) of pRTR with PSRGU identifying no MUC. Nineteen patients (25%) had urgent PSRGU, most commonly due to renal allograft dysfunction, at a median (IQR) of 5.5 (2.7‐12.3) days after stent removal. Of these, two pRTR required ureteric intervention. For our current practice of removing transplant stents at 4‐6 weeks post‐transplantation, our study has found no evidence to support routine PSRGU after elective stent removal. 相似文献