全文获取类型
收费全文 | 2266763篇 |
免费 | 177656篇 |
国内免费 | 25623篇 |
专业分类
耳鼻咽喉 | 31755篇 |
儿科学 | 65674篇 |
妇产科学 | 62696篇 |
基础医学 | 322860篇 |
口腔科学 | 61681篇 |
临床医学 | 212542篇 |
内科学 | 423118篇 |
皮肤病学 | 43169篇 |
神经病学 | 172768篇 |
特种医学 | 88891篇 |
外国民族医学 | 737篇 |
外科学 | 336017篇 |
综合类 | 95644篇 |
现状与发展 | 79篇 |
一般理论 | 555篇 |
预防医学 | 166476篇 |
眼科学 | 55256篇 |
药学 | 180465篇 |
329篇 | |
中国医学 | 20983篇 |
肿瘤学 | 128347篇 |
出版年
2021年 | 27444篇 |
2019年 | 22844篇 |
2018年 | 28775篇 |
2017年 | 23177篇 |
2016年 | 24292篇 |
2015年 | 31701篇 |
2014年 | 42197篇 |
2013年 | 53007篇 |
2012年 | 74099篇 |
2011年 | 80441篇 |
2010年 | 47990篇 |
2009年 | 42588篇 |
2008年 | 69642篇 |
2007年 | 74311篇 |
2006年 | 74729篇 |
2005年 | 73768篇 |
2004年 | 65927篇 |
2003年 | 63341篇 |
2002年 | 60806篇 |
2001年 | 91058篇 |
2000年 | 94183篇 |
1999年 | 82112篇 |
1998年 | 26800篇 |
1997年 | 24889篇 |
1996年 | 23897篇 |
1995年 | 22471篇 |
1994年 | 20890篇 |
1992年 | 63743篇 |
1991年 | 62459篇 |
1990年 | 61280篇 |
1989年 | 59301篇 |
1988年 | 55140篇 |
1987年 | 53982篇 |
1986年 | 51438篇 |
1985年 | 49243篇 |
1984年 | 37272篇 |
1983年 | 32183篇 |
1982年 | 19679篇 |
1979年 | 36067篇 |
1978年 | 25583篇 |
1977年 | 21805篇 |
1976年 | 20452篇 |
1975年 | 22300篇 |
1974年 | 26960篇 |
1973年 | 26039篇 |
1972年 | 24752篇 |
1971年 | 22938篇 |
1970年 | 21622篇 |
1969年 | 20884篇 |
1968年 | 19359篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
103.
Quality of life in stroke survivor–caregiver dyads: a new conceptual framework and longitudinal study protocol
下载免费PDF全文
![点击此处可从《Journal of advanced nursing》网站下载免费的PDF全文](/ch/ext_images/free.gif)
104.
105.
106.
Cost‐Effectiveness and Cost‐Utility Analysis of Spinal Cord Stimulation in Patients With Failed Back Surgery Syndrome: Results From the PRECISE Study
下载免费PDF全文
![点击此处可从《Neuromodulation》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Furio Zucco MD Roberta Ciampichini MSc Angelo Lavano MD Amedeo Costantini MD Marisa De Rose MD Paolo Poli MD Gianpaolo Fortini MD Laura Demartini MD Enrico De Simone MD Valentino Menardo MD Piero Cisotto MD Mario Meglio MD Luciana Scalone PhD Lorenzo G. Mantovani DSc 《Neuromodulation》2015,18(4):266-276
107.
108.
109.
The objective of this study was to investigate short segment decompression of degenerative lumbar scoliosis (DLS) and the efficiency of fusion treatment.After DLS surgery, the patients were retrospectively reviewed using the VAS (visual analog scale) and ODI (Oswestry Disability Index) to assess clinical outcomes. All patients underwent posterior lumbar decompressive laminectomy, pedicle screw internal fixation, and posterolateral bone graft fusion surgery. Radiographic measurements included the scoliotic Cobb angle, the fused Cobb angle, the anterior intervertebral angle (AIA), the sagittal intervertebral angle (SIA), and lumbar lordosis angle. The relationships between these parameters were examined by bivariate Pearson analysis and linear regression analysis.Preoperatively, the Cobb angle at the scoliotic segment was 15.4°, which decreased to 10.2° immediately following surgery (P < 0.05). The AIA significantly increased by the last follow-up (4.4 ± 3.4) compared with pre- and postoperative values (2.5 ± 2.8 and 2.2 ± 2.4, respectively; P < 0.05). However, the scoliotic Cobb angle and the AIA did not correlate with the VAS or ODI scores. At the final follow-up, no patients had pseudoarthrosis or internal instrumentation-related complications.Short fusion surgical treatment results in limited DLS correction, with correction loss over time. The AIA between the upper adjacent segment and proximal fused vertebra continues to increase postoperatively, which does not exacerbate clinical symptoms, as reflected by the low reoperation rates for repairing degeneration at adjacent levels. 相似文献
110.
Emma J. Kilford Iroise Dumontheil Nicholas W. Wood Sarah-Jayne Blakemore 《Social cognitive and affective neuroscience》2015,10(6):777-782
The catechol-O-methyltransferase (COMT) enzyme is a major determinant of prefrontal dopamine levels. The Val158Met polymorphism affects COMT enzymatic activity and has been associated with variation in executive function and affective processing. This study investigated the effect of COMT genotype on the flexible modulation of the balance between processing self-generated and processing stimulus-oriented information, in the presence or absence of affective distractors. Analyses included 124 healthy adult participants, who were also assessed on standard working memory (WM) tasks. Relative to Val carriers, Met homozygotes made fewer errors when selecting and manipulating self-generated thoughts. This effect was partly accounted for by an association between COMT genotype and visuospatial WM performance. We also observed a complex interaction between the influence of affective distractors, COMT genotype and sex on task accuracy: male, but not female, participants showed a sensitivity to the affective distractors that was dependent on COMT genotype. This was not accounted for by WM performance. This study provides novel evidence of the role of dopaminergic genetic variation on the ability to select and manipulate self-generated thoughts. The results also suggest sexually dimorphic effects of COMT genotype on the influence of affective distractors on executive function. 相似文献