全文获取类型
收费全文 | 263904篇 |
免费 | 7063篇 |
国内免费 | 957篇 |
专业分类
耳鼻咽喉 | 2484篇 |
儿科学 | 8167篇 |
妇产科学 | 4758篇 |
基础医学 | 30557篇 |
口腔科学 | 3456篇 |
临床医学 | 20787篇 |
内科学 | 48455篇 |
皮肤病学 | 3292篇 |
神经病学 | 22592篇 |
特种医学 | 12871篇 |
外科学 | 40624篇 |
综合类 | 3704篇 |
现状与发展 | 1篇 |
一般理论 | 49篇 |
预防医学 | 22575篇 |
眼科学 | 5411篇 |
药学 | 16802篇 |
中国医学 | 1571篇 |
肿瘤学 | 23768篇 |
出版年
2023年 | 680篇 |
2022年 | 1831篇 |
2021年 | 3018篇 |
2020年 | 1602篇 |
2019年 | 2088篇 |
2018年 | 24239篇 |
2017年 | 19098篇 |
2016年 | 21789篇 |
2015年 | 4457篇 |
2014年 | 5187篇 |
2013年 | 5843篇 |
2012年 | 14458篇 |
2011年 | 27916篇 |
2010年 | 22673篇 |
2009年 | 14888篇 |
2008年 | 24493篇 |
2007年 | 26505篇 |
2006年 | 5162篇 |
2005年 | 6418篇 |
2004年 | 7057篇 |
2003年 | 7565篇 |
2002年 | 5306篇 |
2001年 | 2740篇 |
2000年 | 2714篇 |
1999年 | 1963篇 |
1998年 | 914篇 |
1997年 | 712篇 |
1996年 | 535篇 |
1995年 | 469篇 |
1994年 | 432篇 |
1993年 | 382篇 |
1992年 | 819篇 |
1991年 | 840篇 |
1990年 | 822篇 |
1989年 | 727篇 |
1988年 | 649篇 |
1987年 | 653篇 |
1986年 | 518篇 |
1985年 | 472篇 |
1984年 | 343篇 |
1983年 | 279篇 |
1982年 | 178篇 |
1981年 | 147篇 |
1980年 | 172篇 |
1979年 | 225篇 |
1978年 | 165篇 |
1976年 | 130篇 |
1975年 | 132篇 |
1974年 | 141篇 |
1972年 | 121篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
112.
113.
114.
Sergio Barroilhet Adrián Cano-Prous Salvador Cervera-Enguix Maria João Forjaz Francisco Guillén-Grima 《Social psychiatry and psychiatric epidemiology》2009,44(12):1051-1065
Introduction
This paper presents the results of a study on the psychometric properties of an authorized Spanish version of the McMaster Family Assessment Device, a self-report measure of family functioning. 相似文献115.
116.
117.
Introduction
Although ependymoma is the third most common pediatric brain tumor, we know little about the genetic/epigenetic basis of its initiation, maintenance, or progression. This is due in part to the heterogeneity of the disease, as well as the small sample size of the cohorts analyzed in most studies. 相似文献118.
119.
Eric Y. T. Chan Daniel K. Ng Chung-hong Chan Ka-li Kwok Pok-yu Chow Josephine M. Cheung Suk-yu Leung 《Sleep & breathing》2009,13(1):59-63
Background and objective The purpose of this study is to assess whether Chinese children with high apnea–hypopnea index (AHI) are sleepier by a modified Epworth Sleepiness Scale (ESS).
Materials and methods Records were retrospectively reviewed. We included children who were between 3 and 12 years old, admitted for overnight polysomnogram
because of suspected obstructive sleep apnea syndrome (OSAS). A modified ESS was used to assess excessive daytime sleepiness
(EDS) of the children.
Results One hundred ninety-two Chinese children were included. Children with high AHI, defined as AHI > 5.0, were sleepier than children with AHI less than or equal
to 5. After adjustment by age, gender, and obesity, children with high AHI remained significantly sleepier. Modified ESS was
significantly correlated with AHI (rho = 0.124, 95% CI = 0.004–0.281). Modified ESS score of >8 was the best cutoff point
with the sensitivity and specificity of 0.29 and 0.91, respectively. The odds ratio of children with modified ESS > 10 having
high AHI was 4.231 (95%CI = 1.248 to 14.338) and children with modified ESS > 8 had the highest odds ratio, 4.295(95%CI = 1.66
to 11.1), of having high AHI.
Conclusion
Chinese children with high AHI appear to be sleepier than children with low AHI. Children with suspected OSAS and high modified ESS,
i.e., ESS > 8, had significantly higher odds ratio of having high AHI. Increased sleepiness is a specific but not a sensitive
symptom in snoring children with high AHI. Screening for EDS in snoring children may help us identify those with high AHI
and prioritize the management of those children.
All authors worked and the study was carried out in Kwong Wah Hospital in Hong Kong. There was no conflict of interest and
no specific source of funding for the study. 相似文献
120.
Peter Angelos 《World journal of surgery》2009,33(4):609-611