全文获取类型
| 收费全文 | 172454篇 |
| 免费 | 34130篇 |
| 国内免费 | 2484篇 |
专业分类
| 耳鼻咽喉 | 5344篇 |
| 儿科学 | 5887篇 |
| 妇产科学 | 2761篇 |
| 基础医学 | 6359篇 |
| 口腔科学 | 1785篇 |
| 临床医学 | 29112篇 |
| 内科学 | 52330篇 |
| 皮肤病学 | 7690篇 |
| 神经病学 | 16813篇 |
| 特种医学 | 7111篇 |
| 外科学 | 44676篇 |
| 综合类 | 503篇 |
| 现状与发展 | 73篇 |
| 一般理论 | 25篇 |
| 预防医学 | 8760篇 |
| 眼科学 | 3702篇 |
| 药学 | 2612篇 |
| 中国医学 | 50篇 |
| 肿瘤学 | 13475篇 |
出版年
| 2024年 | 704篇 |
| 2023年 | 4961篇 |
| 2022年 | 1601篇 |
| 2021年 | 3982篇 |
| 2020年 | 6456篇 |
| 2019年 | 2887篇 |
| 2018年 | 8191篇 |
| 2017年 | 7891篇 |
| 2016年 | 8974篇 |
| 2015年 | 9055篇 |
| 2014年 | 16368篇 |
| 2013年 | 16740篇 |
| 2012年 | 7339篇 |
| 2011年 | 7367篇 |
| 2010年 | 11333篇 |
| 2009年 | 15070篇 |
| 2008年 | 7234篇 |
| 2007年 | 5467篇 |
| 2006年 | 7789篇 |
| 2005年 | 5035篇 |
| 2004年 | 4241篇 |
| 2003年 | 3135篇 |
| 2002年 | 3201篇 |
| 2001年 | 3931篇 |
| 2000年 | 3113篇 |
| 1999年 | 3385篇 |
| 1998年 | 3861篇 |
| 1997年 | 3633篇 |
| 1996年 | 3498篇 |
| 1995年 | 3335篇 |
| 1994年 | 2083篇 |
| 1993年 | 1680篇 |
| 1992年 | 1470篇 |
| 1991年 | 1464篇 |
| 1990年 | 1140篇 |
| 1989年 | 1239篇 |
| 1988年 | 1082篇 |
| 1987年 | 934篇 |
| 1986年 | 954篇 |
| 1985年 | 773篇 |
| 1984年 | 633篇 |
| 1983年 | 595篇 |
| 1982年 | 596篇 |
| 1981年 | 478篇 |
| 1980年 | 441篇 |
| 1979年 | 353篇 |
| 1978年 | 383篇 |
| 1977年 | 438篇 |
| 1975年 | 311篇 |
| 1972年 | 327篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
101.
102.
103.
104.
Kimberly B. Glazer Kendrin R. Sonneville Nadia Micali Sonja A. Swanson Ross Crosby Nicholas J. Horton Kamryn T. Eddy Alison E. Field 《The Journal of adolescent health》2019,64(2):165-171
Purpose
To quantify eating disorder (ED) stability and diagnostic transition among a community-based sample of adolescents and young adult females in the United States.Methods
Using 11 prospective assessments from 9,031 U.S. females ages 9–15 years at baseline of the Growing Up Today Study, we classified cases of the following EDs involving bingeing and purging: bulimia nervosa (BN), binge ED, purging disorder (PD), and subthreshold variants defined by less frequent (monthly vs. weekly) bingeing and purging behaviors. We measured number of years symptomatic and probability of maintaining symptoms, crossing to another diagnosis, or resolving symptoms across consecutive surveys.Results
Study lifetime disorder prevalence was 2.1% for BN and roughly 6% each for binge ED and PD. Most cases reported symptoms during only one survey year. Twenty-six percent of cases crossed between diagnoses during follow-up. Among participants meeting full threshold diagnostic criteria, transition from BN was most prevalent, crossing most frequently from BN to PD (12.9% of BN cases). Within each disorder phenotype, 20%–40% of cases moved between subthreshold and full threshold criteria across consecutive surveys.Conclusions
Diagnostic crossover is not rare among adolescent and young adult females with an ED. Transition patterns from BN to PD add support for considering these classifications in the same diagnostic category of disorders that involve purging. The prevalence of crossover between monthly and weekly symptom frequency suggests that a continuum or staging approach may increase utility of ED classification for prognostic and therapeutic intervention. 相似文献105.
Juliette A. Loncaster MD FRCR Ernest Allan 《Photodiagnosis and Photodynamic Therapy》2006,3(2):134-137
Gorlin syndrome (naevoid basal cell carcinoma syndrome) is a genetically linked disorder characterized by the development of multiple basal cell carcinomas (BCCs) throughout life. Cumulative surgery, cryotherapy and other conventional interventions can result in significant disfigurement by middle age. Radiotherapy is contra-indicated because the mutated gene underlying the syndrome, ‘PTCH’, increases sensitivity to ionising radiation, so there is significant likelihood of inducing further tumours in and around the irradiated area. Photodynamic therapy offers a non-invasive treatment option for patients with this condition, with the added advantage of causing minimal scarring. 相似文献
106.
107.
108.
109.
110.