全文获取类型
收费全文 | 3025619篇 |
免费 | 257993篇 |
国内免费 | 51009篇 |
专业分类
耳鼻咽喉 | 40213篇 |
儿科学 | 80370篇 |
妇产科学 | 71056篇 |
基础医学 | 406172篇 |
口腔科学 | 79116篇 |
临床医学 | 306022篇 |
内科学 | 553834篇 |
皮肤病学 | 54556篇 |
神经病学 | 233059篇 |
特种医学 | 120925篇 |
外国民族医学 | 1261篇 |
外科学 | 422574篇 |
综合类 | 181035篇 |
现状与发展 | 155篇 |
一般理论 | 1030篇 |
预防医学 | 236738篇 |
眼科学 | 73985篇 |
药学 | 248559篇 |
795篇 | |
中国医学 | 47832篇 |
肿瘤学 | 175334篇 |
出版年
2021年 | 47451篇 |
2020年 | 34197篇 |
2019年 | 37299篇 |
2018年 | 45313篇 |
2017年 | 39151篇 |
2016年 | 39186篇 |
2015年 | 52251篇 |
2014年 | 69824篇 |
2013年 | 84501篇 |
2012年 | 118657篇 |
2011年 | 128417篇 |
2010年 | 81106篇 |
2009年 | 71880篇 |
2008年 | 107245篇 |
2007年 | 111768篇 |
2006年 | 111767篇 |
2005年 | 108293篇 |
2004年 | 92777篇 |
2003年 | 88832篇 |
2002年 | 84768篇 |
2001年 | 126183篇 |
2000年 | 130774篇 |
1999年 | 113237篇 |
1998年 | 37939篇 |
1997年 | 35621篇 |
1996年 | 33372篇 |
1995年 | 32016篇 |
1994年 | 29346篇 |
1993年 | 25599篇 |
1992年 | 83710篇 |
1991年 | 80018篇 |
1990年 | 76733篇 |
1989年 | 73546篇 |
1988年 | 68158篇 |
1987年 | 66631篇 |
1986年 | 62865篇 |
1985年 | 59603篇 |
1984年 | 44881篇 |
1983年 | 38028篇 |
1982年 | 23101篇 |
1979年 | 41457篇 |
1978年 | 28994篇 |
1977年 | 24338篇 |
1976年 | 22842篇 |
1975年 | 23987篇 |
1974年 | 29673篇 |
1973年 | 28083篇 |
1972年 | 26295篇 |
1971年 | 24195篇 |
1970年 | 22776篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
91.
92.
93.
94.
Feng Wang Dachuan Wang Bingyi Tan Jun Dong Rongjie Feng Zenong Yuan Naiguo Wang 《Medicine》2015,94(39)
The present study aimed at examining the curative effect of modified posterior operation on treatment of Kümmell''s disease.About 30 patients of Kümmell''s disease with complete image and clinical data treated during June 2004 to July 2013 were conducted with anterior and posterior approaches, respectively. Kyphotic Cobb angle, fractured vertebra wedge angle, and the anterior and posterior heights of fractured vertebra were all measured through x-ray before and after operation, and the pain visual analog scale (VAS) was determined for evaluating the effect of operations. The injury and restoration of neurological function were assessed using Frankel classification.Patients in group A were treated with anterior operation, whereas group B was posterior operation. Postoperatively, VAS score, kyphotic Cobb angle, anterior vertebra height, and pathologic vertebra wedge angle were all significantly improved in patients with Kümmell''s disease receiving modified posterior operation (group B). Similar results were also observed in patients with anterior operation. The improvement of VAS and correction rate of kyphotic Cobb angle indicated equivalent effects of posterior and anterior operations. Meanwhile, alleviated neurological function damage was observed in 2 groups. Relevant factor analysis illustrated that there was no significant correlation of the severity and improvement rate of pain symptoms with age, medical history, anterior and posterior vertebra heights, kyphotic Cobb angle, and pathological vertebra wedge angle.Compared with traditional anterior approach, modified posterior operation, adopting transpedicular vertebral body grafting combined with vertebral pedicle screw fixation, could produce equivalent effects on kyphosis correction, pain relief, and improvement of neurological function in patients with Kümmell''s disease. 相似文献
95.
96.
目的探讨脑卒中患者急性应激障碍发生现状及影响因素。方法采用斯坦福急性应激反应问卷对349例脑卒中住院患者进行调查。结果共163例(46.70%)患者发生急性应激障碍;Logistic回归分析结果显示,患者性格、是否存在偏瘫及是否吞咽功能障碍是脑卒中患者发生急性应激障碍的主要影响因素(P0.05,P0.01)。结论脑卒中患者急性应激障碍发生率较高,内向性格及存在偏瘫和吞咽功能障碍的患者更容易发生急性应激障碍。医护人员应及时为高危患者提供个体化治疗及预见性护理,防止脑卒中患者发生急性应激障碍。 相似文献
97.
Robert C. Lynall J. Troy Blackburn Kevin M. Guskiewicz Stephen W. Marshall Prudence Plummer Jason P. Mihalik 《Journal of Science and Medicine in Sport》2019,22(5):503-508
Objectives
Despite evidence for increased musculoskeletal injury after concussion recovery, there is a lack of dynamic balance assessments that could inform management and research into this increased injury risk post-concussion. Our purpose was to identify tandem gait dynamic balance deficits in recreational athletes with a concussion history within the past 18-months compared to matched controls.Design
Cross-sectional, laboratory study.Methods
Fifteen participants with a concussion history (age: 19.7 ± 0.9 years; 9 females; median time since concussion 126 days, range 28–432 days), and 15 matched controls (19.7 ± 1.6 years; 9 females) with no recent concussion history participated. We measured center-of-pressure (COP) outcomes (velocity, path length, speed, dual-task cost) under 4 tandem gait conditions: (1) tandem gait, (2) tandem gait, eyes closed, (3) tandem gait, eyes open, cognitive distraction, and (4) tandem gait, eyes closed, cognitive distraction.Results
The concussion history group demonstrated slower tandem gait velocity compared to the control group (4.0 cm/s difference), thus velocity was used as a covariate when analyzing COP path length and speed. The concussion history group (23.5%) demonstrated greater COP speed dual-task cost than the control group (16.3%) during the eyes closed dual-task condition. No other comparisons were statistically significant.Conclusions
There may be subtle dynamic balance differences during tandem gait that are detectable after return-to-activity following concussion, but the clinical significance of these findings is unclear. Longitudinal investigations should identify acute movement deficits in varying visual and cognitive scenarios after concussion in comparison with recovery on traditional concussion assessment tools while also recording musculoskeletal injury outcomes. 相似文献98.
Alexander E. J. Trevatt David R. Thomson Robert Miller Matthew Colquhoun Akinyemi I. Idowu Shakeel Rahman 《Journal of plastic surgery and hand surgery》2019,53(2):97-104
Academic output is just one aspect of a successful career as a plastic surgeon. However, for those with a strong interest in academia, the academic output of a department will likely be a key factor when deciding how to rank jobs. The aim of this study was to quantify and rank the academic output of plastic surgery units across the UK and Ireland. The Institute for Scientific Information (ISI) Web of Science Bibliometric analysis tool was used to collate cumulative (1950–2016), 10 year (2006–2016) and 3 years (2013–2015) research output data for plastic surgery units in the UK and Ireland. Sixty-six plastic surgery units were identified. Departments were ranked for each time period according to the number of papers produced, number of citations (Nc) and h-index (a measure of the impact of scientific output). The top 3 departments for number of papers in the last 10 years were The Royal Free Hospital, London (226) Broomfield Hospital, Chelmsford (218), and Morriston Hospital and Swansea (188). The top 3 for h-number were The Royal Free Hospital (21) Wythenshawe Hospital, Manchester (18) and Morriston Hospital (17). Academic output varies across plastic surgery units in the UK and Ireland. A number of departments have consistently maintained high academic outputs across the years and will be of interest to surgeons hoping to pursue a career in academia. 相似文献
99.
100.
目的探讨人工弓状线切开技术在变异弓状线病例腹腔镜全腹膜外腹股沟疝修补术(TEP)应用的可靠性、安全性和有效性。
方法回顾性分析2016年7月至2019年8月广东医科大学茶山医院施行TEP的60例弓状线变异患者资料,在脐与耻骨联合连线中点人为切开腹直肌后鞘及其后面的腹横筋膜创建一条人工弓状线,并对其后面的腹膜前间隙进分离。影像记录弓状线的形态和手术步骤。
结果低位弓状线50例(83.3%),位于脐下8~12 cm,表现为不完整的腹直肌后鞘,向下呈逐渐变薄、变少的散在纤维。无弓状线10例(16.7%),有完整的腹直肌后鞘并一直延伸至耻骨。以人工弓状线为界分为两个层面,前面的是腹直肌后间隙,后面是腹膜前间隙,位于腹横筋膜(含有后鞘)与腹膜前筋膜浅层之间,是TEP理想的分离层面,沿此间隙向下分离与Retzius间隙相连,然后向外分离Bogros间隙。本组平均手术时间(130±15)min,术中腹膜损伤率8.3%(5/60)。术后发生血肿3例,血清肿2例,皮下气肿3例,无慢性疼痛病例。术后平均随访25个月,无复发病例。
结论人工弓状线切开技术在低位和无弓状线患者的TEP手术中安全有效、简单可靠,值得推广。 相似文献