全文获取类型
收费全文 | 269830篇 |
免费 | 20647篇 |
国内免费 | 922篇 |
专业分类
耳鼻咽喉 | 3019篇 |
儿科学 | 7142篇 |
妇产科学 | 5723篇 |
基础医学 | 35430篇 |
口腔科学 | 5568篇 |
临床医学 | 26586篇 |
内科学 | 57083篇 |
皮肤病学 | 3494篇 |
神经病学 | 26036篇 |
特种医学 | 9001篇 |
外国民族医学 | 13篇 |
外科学 | 42027篇 |
综合类 | 4686篇 |
现状与发展 | 3篇 |
一般理论 | 345篇 |
预防医学 | 24280篇 |
眼科学 | 5136篇 |
药学 | 18847篇 |
1篇 | |
中国医学 | 460篇 |
肿瘤学 | 16519篇 |
出版年
2023年 | 1029篇 |
2022年 | 1686篇 |
2021年 | 4730篇 |
2020年 | 2856篇 |
2019年 | 4609篇 |
2018年 | 5459篇 |
2017年 | 4196篇 |
2016年 | 4570篇 |
2015年 | 5473篇 |
2014年 | 7938篇 |
2013年 | 11371篇 |
2012年 | 17224篇 |
2011年 | 18500篇 |
2010年 | 10462篇 |
2009年 | 9428篇 |
2008年 | 17109篇 |
2007年 | 18188篇 |
2006年 | 17500篇 |
2005年 | 17933篇 |
2004年 | 17092篇 |
2003年 | 15967篇 |
2002年 | 15270篇 |
2001年 | 2944篇 |
2000年 | 2396篇 |
1999年 | 3012篇 |
1998年 | 3482篇 |
1997年 | 3030篇 |
1996年 | 2717篇 |
1995年 | 2451篇 |
1994年 | 2170篇 |
1993年 | 2057篇 |
1992年 | 1931篇 |
1991年 | 1818篇 |
1990年 | 1650篇 |
1989年 | 1626篇 |
1988年 | 1578篇 |
1987年 | 1538篇 |
1986年 | 1555篇 |
1985年 | 1538篇 |
1984年 | 1895篇 |
1983年 | 1876篇 |
1982年 | 2109篇 |
1981年 | 1936篇 |
1980年 | 1773篇 |
1979年 | 1118篇 |
1978年 | 1200篇 |
1977年 | 1156篇 |
1976年 | 1040篇 |
1975年 | 859篇 |
1974年 | 849篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
51.
Alexander S. Dakos Ellen M. Walker Huai Jiang Barry E. Stein Benjamin A. Rowland 《The European journal of neuroscience》2019,50(11):3702-3712
Unilateral lesions of visual cortex have the secondary consequence of suppressing visual circuits in the midbrain superior colliculus (SC), collectively producing blindness in contralesional space (“hemianopia”). Recent studies have demonstrated that SC visual responses and contralesional vision can be reinstated by a non‐invasive multisensory training procedure in which spatiotemporally concordant visual‐auditory pairs are repeatedly presented within the blind hemifield. Despite this recovery of visual responsiveness, the loss of visual cortex was expected to result in permanent deficits in that hemifield, especially when visual events in both hemifields compete for attention and access to the brain's visuomotor circuitry. This was evaluated in the present study in a visual choice paradigm in which the two visual hemifields of recovered cats were simultaneously stimulated with equally valent visual targets. Surprisingly, the expected disparity was not found, and some animals even preferred stimuli presented in the previously blind hemifield. This preference persisted across multiple stimulus intensity levels and there was no indication that animals were less aware of cues in the previously blind hemifield than in its spared counterpart. Furthermore, when auditory cues were combined with visual cues, the enhanced performance they produced on a visual task was no greater in the normal than in the previously blind hemifield. These observations suggest that the multisensory rehabilitation paradigm revealed greater inherent visual information processing potential in the previously blind hemifield than was believed possible given the loss of visual cortex. 相似文献
52.
53.
54.
55.
Evaluation of training nurses to perform semi‐automated three‐dimensional left ventricular ejection fraction using a customised workstation‐based training protocol
下载免费PDF全文
![点击此处可从《Journal of clinical nursing》网站下载免费的PDF全文](/ch/ext_images/free.gif)
56.
Sharisse M. Arnold Rehring Liza M. Reifler Jennifer H. Seidel Karen A. Glenn John F. Steiner 《Academic pediatrics》2019,19(5):572-580
ObjectiveClinical specialty societies recommend long-acting reversible contraceptives (LARCs) as first-line contraception for adolescent women. We evaluated whether a combined educational and process improvement intervention enhanced LARC placement in primary care within an integrated health care system.MethodsThe intervention included journal clubs, live continuing education, point-of-care guidelines, and new patient materials. We conducted a retrospective cohort study across 3 time periods: baseline (January 2013?September 2015), early implementation (October 2015–March 2016), and full implementation (April 2016–June 2017). The primary outcome was the proportion of LARCs placed by primary care clinicians among women aged 13 to 18 years compared with gynecology clinicians.ResultsKaiser Foundation Health Plan of Colorado cared for approximately 20,000 women aged 13 to 18 years in each calendar quarter between 2013 and 2017. Overall, LARC placement increased from 7.0 per 1000 members per quarter at baseline to 13.0 per 1000 during the full intervention. Primary care clinicians placed 6.2% of all LARCs in 2013, increasing to 32.1% by 2017 (P < .001), including 45.5% of contraceptive implants. Clinicians who attended educational sessions were more likely to adopt LARCs than those who did not (17.9% vs 6.4% respectively, P = .009). Neither overall LARC placement rates (relative risk, 1.9; 95% confidence interval, 0.7?5.6) nor contraceptive implant rates (relative risk, 3.0; 95% confidence interval, 0.9?9.8) increased significantly in clinicians who attended educational activities.ConclusionsThis multimodal intervention was associated with increased LARC placement for adolescent women in primary care. The combination of education and process improvement is a promising strategy to promote clinician behavior change. 相似文献
57.
58.
59.
John Lennon Silva Cunha Amanda Almeida Leite Thamiris de Castro Abrantes Lorena Passoni Vervloet Thayn Melo de Lima Morais Gerson de Oliveira Paiva Neto Tatiana Nayara Librio Kimura Snia Maria Soares Ferreira Ricardo Luiz Cavalcanti de Albuquerque‐Júnior Aline Corrêa Abraho Mario Jos Romaach Bruno Augusto Benevenuto de Andrade Oslei Paes de Almeida Ciro Dantas Soares 《Journal of cutaneous pathology》2021,48(1):24-33
60.