全文获取类型
收费全文 | 3996篇 |
免费 | 495篇 |
国内免费 | 35篇 |
专业分类
耳鼻咽喉 | 14篇 |
儿科学 | 121篇 |
妇产科学 | 304篇 |
基础医学 | 294篇 |
口腔科学 | 159篇 |
临床医学 | 1097篇 |
内科学 | 491篇 |
皮肤病学 | 94篇 |
神经病学 | 195篇 |
特种医学 | 272篇 |
外科学 | 443篇 |
综合类 | 139篇 |
一般理论 | 3篇 |
预防医学 | 449篇 |
眼科学 | 34篇 |
药学 | 279篇 |
中国医学 | 7篇 |
肿瘤学 | 131篇 |
出版年
2023年 | 50篇 |
2021年 | 34篇 |
2020年 | 46篇 |
2019年 | 39篇 |
2018年 | 99篇 |
2017年 | 118篇 |
2016年 | 106篇 |
2015年 | 132篇 |
2014年 | 152篇 |
2013年 | 158篇 |
2012年 | 157篇 |
2011年 | 183篇 |
2010年 | 153篇 |
2009年 | 163篇 |
2008年 | 148篇 |
2007年 | 145篇 |
2006年 | 144篇 |
2005年 | 121篇 |
2004年 | 115篇 |
2003年 | 134篇 |
2002年 | 118篇 |
2001年 | 125篇 |
2000年 | 93篇 |
1999年 | 108篇 |
1998年 | 129篇 |
1997年 | 137篇 |
1996年 | 124篇 |
1995年 | 115篇 |
1994年 | 82篇 |
1993年 | 64篇 |
1992年 | 69篇 |
1991年 | 65篇 |
1990年 | 54篇 |
1989年 | 88篇 |
1988年 | 71篇 |
1987年 | 55篇 |
1986年 | 62篇 |
1985年 | 82篇 |
1984年 | 37篇 |
1983年 | 49篇 |
1982年 | 35篇 |
1981年 | 35篇 |
1980年 | 30篇 |
1979年 | 31篇 |
1978年 | 39篇 |
1977年 | 29篇 |
1976年 | 27篇 |
1975年 | 23篇 |
1974年 | 16篇 |
1969年 | 19篇 |
排序方式: 共有4526条查询结果,搜索用时 15 毫秒
1.
Olga A. Klein Avril Drummond Jacqueline R. Mhizha-Murira Laura Mansford Roshan dasNair 《Neuropsychological rehabilitation》2019,29(4):491-512
While previous randomised controlled trials and meta-analyses offer only limited evidence for the effectiveness of cognitive rehabilitation, qualitative studies examining patient perspectives report more positive outcomes. This meta-synthesis of qualitative studies examined patient perspectives of cognitive rehabilitation for memory, attention, and executive function problems in people with multiple sclerosis. Using set eligibility criteria, we screened electronic databases, reference lists, and academic networks for relevant papers. Seven papers (195 participants) were selected. Two independent researchers conducted quality appraisals of papers. Data analysis, guided by the thematic synthesis approach, yielded six main themes. These suggested that patients benefitted from the group environment in rehabilitation. Cognitive rehabilitation facilitated the participants’ reflection and awareness of their cognitive deficits, and was associated with increased knowledge and understanding of their illness. Increased strategy use was reported and associated with improvements in cognitive functioning and greater confidence and perseverance. Participants reported emotional and social improvements, and felt more optimistic. Overall, these changes had a positive impact on participants’ quality of life. This synthesis of qualitative studies indicates that people with multiple sclerosis who experience cognitive deficits benefit from cognitive rehabilitation programmes. This finding must, however, be viewed in light of the limitations of this meta-synthesis. The meta-synthesis was registered in the PROSPERO database under CRD42017040148. 相似文献
2.
3.
4.
D Van Neste† RM Trüeb‡ 《Journal of the European Academy of Dermatology and Venereology》2006,20(5):578-583
BACKGROUND: Computer-assisted image analysis has been proposed for human hair growth studies. METHODS: The performances of Trichoscan, a commercially available automated system combining epiluminiscence microscopy with digital image analysis, developed for office-based hair growth measurements, have been evaluated comparatively on the same skin sites using standardized photographic equipment and calibrated processing for contrast-enhanced phototrichogram (CE-PTG) analysis. This reference method has been validated with scalp biopsies and histological examination of serial sectioning. RESULTS: Besides edge effects, hair fibres escaped the Trichoscan analysis for various reasons including, but not limited to, thickness, pigmentation, closeness and crossing. CONCLUSION: Most of these problems have been identified in the late 1980s and remain largely unsolved by the processing software that was evaluated in 2004. Therefore claims promoting the Trichoscan method for accurate hair measurements in clinical trials on scalp and body hair are not supported by the present investigation. The speed at which the analysis is performed is outweighed by the errors in signal detection. Therefore we suggest that improvements must be clearly documented before Trichoscan is established for quantified diagnostic purposes and detailed hair cycle monitoring during hair trials. 相似文献
5.
6.
7.
8.
9.
10.