全文获取类型
收费全文 | 3519900篇 |
免费 | 283193篇 |
国内免费 | 28699篇 |
专业分类
耳鼻咽喉 | 48558篇 |
儿科学 | 105086篇 |
妇产科学 | 93410篇 |
基础医学 | 486770篇 |
口腔科学 | 97228篇 |
临床医学 | 337444篇 |
内科学 | 673474篇 |
皮肤病学 | 71575篇 |
神经病学 | 287680篇 |
特种医学 | 137688篇 |
外国民族医学 | 1398篇 |
外科学 | 512924篇 |
综合类 | 126505篇 |
现状与发展 | 80篇 |
一般理论 | 1348篇 |
预防医学 | 280259篇 |
眼科学 | 85328篇 |
药学 | 266231篇 |
339篇 | |
中国医学 | 23655篇 |
肿瘤学 | 194812篇 |
出版年
2021年 | 38806篇 |
2019年 | 34843篇 |
2018年 | 45019篇 |
2017年 | 35776篇 |
2016年 | 38062篇 |
2015年 | 46624篇 |
2014年 | 64394篇 |
2013年 | 86556篇 |
2012年 | 118611篇 |
2011年 | 127079篇 |
2010年 | 75781篇 |
2009年 | 69632篇 |
2008年 | 112537篇 |
2007年 | 118445篇 |
2006年 | 119658篇 |
2005年 | 116796篇 |
2004年 | 106748篇 |
2003年 | 102335篇 |
2002年 | 99084篇 |
2001年 | 155845篇 |
2000年 | 161519篇 |
1999年 | 138084篇 |
1998年 | 43208篇 |
1997年 | 39837篇 |
1996年 | 38456篇 |
1995年 | 36699篇 |
1994年 | 33736篇 |
1993年 | 30690篇 |
1992年 | 105597篇 |
1991年 | 101272篇 |
1990年 | 97437篇 |
1989年 | 93482篇 |
1988年 | 86590篇 |
1987年 | 84947篇 |
1986年 | 79979篇 |
1985年 | 76287篇 |
1984年 | 58104篇 |
1983年 | 49458篇 |
1982年 | 30303篇 |
1979年 | 53581篇 |
1978年 | 37767篇 |
1977年 | 31692篇 |
1976年 | 29781篇 |
1975年 | 31020篇 |
1974年 | 38165篇 |
1973年 | 36461篇 |
1972年 | 34201篇 |
1971年 | 31451篇 |
1970年 | 29755篇 |
1969年 | 27684篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
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
2.
3.
4.
5.
Nancy C. Lee 《Public health reports (Washington, D.C. : 1974)》2015,130(2):121-Apr;130(2):121
6.
7.
8.
Wojciech Szychta M.D. Ph.D. Gheorghe Cerin M.D. Ph.D. F.E.S.C. Bogdan Adrian Popa M.D. Armienti Felice M.D. Guido Lanzillo M.D. Ph.D. Marco Diena M.D. Grzegorz Opolski M.D. Ph.D. F.E.S.C. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(6):1040-1043
Sinus venosus atrial septal defect (SV‐ASD) usually coexists with partial anomalous pulmonary vein connection (PAPVC). It is a difficult diagnosis in transthoracic echocardiography (TTE) due to eccentric position of defects. We present a rare case of atypical anatomical variation in PAPVC, which was never described before. Two right pulmonary veins drained into superior vena cava, which overrode SV‐ASD and interatrial septum, a third pulmonary vein into the right atrium. Complete diagnosis could not be set after TTE, nor transesophageal echocardiography, whereas angio‐CT was finally conclusive. This diagnostic approach allowed the surgical planning. 相似文献
9.
10.
Improvement in Tricuspid Annular Plane Systolic Excursion with Pulmonary Hypertension Therapy in Pediatric Patients 下载免费PDF全文