全文获取类型
| 收费全文 | 2888621篇 |
| 免费 | 237380篇 |
| 国内免费 | 5497篇 |
专业分类
| 耳鼻咽喉 | 42719篇 |
| 儿科学 | 88392篇 |
| 妇产科学 | 78390篇 |
| 基础医学 | 409166篇 |
| 口腔科学 | 84114篇 |
| 临床医学 | 261828篇 |
| 内科学 | 560590篇 |
| 皮肤病学 | 58804篇 |
| 神经病学 | 242833篇 |
| 特种医学 | 116022篇 |
| 外国民族医学 | 1042篇 |
| 外科学 | 440159篇 |
| 综合类 | 72541篇 |
| 现状与发展 | 3篇 |
| 一般理论 | 1168篇 |
| 预防医学 | 233488篇 |
| 眼科学 | 69424篇 |
| 药学 | 216096篇 |
| 4篇 | |
| 中国医学 | 5373篇 |
| 肿瘤学 | 149342篇 |
出版年
| 2018年 | 28601篇 |
| 2016年 | 24526篇 |
| 2015年 | 27865篇 |
| 2014年 | 40223篇 |
| 2013年 | 61418篇 |
| 2012年 | 82680篇 |
| 2011年 | 87178篇 |
| 2010年 | 51308篇 |
| 2009年 | 49059篇 |
| 2008年 | 82711篇 |
| 2007年 | 88611篇 |
| 2006年 | 89223篇 |
| 2005年 | 87093篇 |
| 2004年 | 84298篇 |
| 2003年 | 81403篇 |
| 2002年 | 80133篇 |
| 2001年 | 130002篇 |
| 2000年 | 134486篇 |
| 1999年 | 113892篇 |
| 1998年 | 33474篇 |
| 1997年 | 30555篇 |
| 1996年 | 30125篇 |
| 1995年 | 29132篇 |
| 1994年 | 27445篇 |
| 1993年 | 25568篇 |
| 1992年 | 93018篇 |
| 1991年 | 89776篇 |
| 1990年 | 86890篇 |
| 1989年 | 83708篇 |
| 1988年 | 78019篇 |
| 1987年 | 77028篇 |
| 1986年 | 72869篇 |
| 1985年 | 69943篇 |
| 1984年 | 53440篇 |
| 1983年 | 45713篇 |
| 1982年 | 28235篇 |
| 1981年 | 25246篇 |
| 1980年 | 23763篇 |
| 1979年 | 51271篇 |
| 1978年 | 36320篇 |
| 1977年 | 30596篇 |
| 1976年 | 28595篇 |
| 1975年 | 30330篇 |
| 1974年 | 37521篇 |
| 1973年 | 35866篇 |
| 1972年 | 33636篇 |
| 1971年 | 31076篇 |
| 1970年 | 29399篇 |
| 1969年 | 27645篇 |
| 1968年 | 25148篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
101.
102.
103.
Ahmed M. Abu El-Asrar Ajmal Ahmad Eef Allegaert Mohammad Mairaj Siddiquei Priscilla W. Gikandi Gert De Hertogh 《Ocular immunology and inflammation》2020,28(4):575-588
ABSTRACT
Purpose
To investigate the expression of IL-11 and its receptor IL-11Rα and to quantify density of CD163+ M2 macrophages in proliferative diabetic retinopathy (PDR). 相似文献104.
105.
Purpose
Chest wall pain is an uncommon but bothersome late complication following lung stereotactic body radiation therapy. Despite numerous studies investigating predictors of chest wall pain, no clear consensus has been established for a chest wall constraint. The aim of our study was to investigate factors related to chest wall pain in a homogeneous group of patients treated at our institution.Patients and methods
All 122 patients were treated with the same stereotactic body radiation therapy regimen of 48 Gy in three fractions, seen for at least 6 months of follow-up, and planned with heterogeneity correction. Chest wall pain was scored according to the Common Terminology Criteria for Adverse Events classification v3.0. Patient (age, sex, diabetes, osteoporosis), tumour (planning target volume, volume of the overlapping region between planning target volume and chest wall) and chest wall dosimetric parameters (volumes receiving at least 30, 40, and 50 Gy, the minimal doses received by the highest irradiated 1, 2, and 5 cm3, and maximum dose) were collected. The correlation between chest wall pain (grade 2 or higher) and the different parameters was evaluated using univariate and multivariate logistic regression.Results
Median follow-up was 18 months (range: 6–56 months). Twelve patients out of 122 developed chest wall pain of any grade (seven with grade 1, three with grade 2 and two with grade 3 pain). In univariate analysis, only the volume receiving 30 Gy or more (P = 0.034) and the volume of the overlapping region between the planning target volume and chest wall (P = 0.038) significantly predicted chest wall pain, but these variables were later proved non-significant in multivariate regression.Conclusion
Our analysis could not find any correlation between the studied parameters and chest wall pain. Considering our present study and the wide range of differing results from the literature, a reasonable conclusion is that a constraint for chest wall pain is yet to be defined. 相似文献106.
R. Di Raimondo J. Sanz-Esporr&#;n R. Pl&#; I. Sanz-Mart&#;n F. Luengo F. Vignoletti J. Nu&#;ez Mariano Sanz 《Clinical oral investigations》2020,24(7):2351-2361
To evaluate the changes in alveolar contour after guided bone regeneration (GBR) with two different combinations of biomaterials in dehiscence defects arou 相似文献
107.
108.
109.