全文获取类型
收费全文 | 2923篇 |
免费 | 488篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 102篇 |
妇产科学 | 25篇 |
基础医学 | 153篇 |
口腔科学 | 14篇 |
临床医学 | 105篇 |
内科学 | 627篇 |
皮肤病学 | 5篇 |
神经病学 | 600篇 |
特种医学 | 14篇 |
外科学 | 46篇 |
综合类 | 102篇 |
预防医学 | 1361篇 |
药学 | 140篇 |
1篇 | |
中国医学 | 110篇 |
肿瘤学 | 23篇 |
出版年
2024年 | 9篇 |
2023年 | 83篇 |
2022年 | 34篇 |
2021年 | 177篇 |
2020年 | 158篇 |
2019年 | 174篇 |
2018年 | 93篇 |
2017年 | 150篇 |
2016年 | 145篇 |
2015年 | 142篇 |
2014年 | 163篇 |
2013年 | 219篇 |
2012年 | 185篇 |
2011年 | 166篇 |
2010年 | 137篇 |
2009年 | 134篇 |
2008年 | 133篇 |
2007年 | 142篇 |
2006年 | 123篇 |
2005年 | 124篇 |
2004年 | 98篇 |
2003年 | 97篇 |
2002年 | 85篇 |
2001年 | 74篇 |
2000年 | 40篇 |
1999年 | 37篇 |
1998年 | 45篇 |
1997年 | 38篇 |
1996年 | 14篇 |
1995年 | 11篇 |
1994年 | 17篇 |
1993年 | 10篇 |
1992年 | 25篇 |
1991年 | 19篇 |
1990年 | 16篇 |
1989年 | 13篇 |
1988年 | 13篇 |
1987年 | 10篇 |
1986年 | 5篇 |
1985年 | 11篇 |
1984年 | 7篇 |
1983年 | 6篇 |
1982年 | 9篇 |
1980年 | 4篇 |
1979年 | 5篇 |
1978年 | 6篇 |
1977年 | 5篇 |
1975年 | 3篇 |
1973年 | 4篇 |
1972年 | 3篇 |
排序方式: 共有3430条查询结果,搜索用时 15 毫秒
1.
2.
3.
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4.
Finn Skårderud 《European eating disorders review》2007,15(5):323-339
This paper presents a new outline for psychotherapy with personsn with anorexia nervosa. ‘Model on mentalisation’ is the intellectual and empirical framework for this contribution. Mentalisation is defined as the ability to understand feelings, cognitions, intentions and meaning in oneself and in others. The capacity to understand oneself and others is a key determinant of self‐organisation and affect regulation, and is acquired in early attachment relationships. Impaired mentalisation is documented and described as a central psychopathological feature in anorexia nervosa. Psychotherapeutic enterprise with individuals with compromised mentalising capacity should be an activity that is specifically focused on the rehabilitation of this function, with special emphasis on how the body is representing mental states. The paper describes psychotherapeutic goals, stances and techniques. It is intended that this outline will be further developed into manuals as a basis for therapy, training and research. Copyright © 2007 John Wiley & Sons, Ltd and Eating Disorders Association. 相似文献
5.
Nuray
. Kanbur Eudice Goldberg Leora Pinhas Robert M. Hamilton Robin Clegg Debra K. Katzman 《The International journal of eating disorders》2009,42(6):575-578
Anorexia nervosa (AN) can cause both functional and structural cardiac complications, including a variety of different conduction abnormalities. This is the first case report of symptomatic diurnal second‐degree atrioventricular (AV) block (Mobitz Type I) in an adolescent with AN. We present a 12‐year‐old girl with AN, restrictor sub‐type who reported cardiac symptoms during weight gain, at the time of the initial diagnosis of AV block. Second‐degree AV block (Mobitz Type I) is discussed as a possible complication of the AN, as well as being an intrinsic conduction system disease. © 2009 by Wiley Periodicals, Inc. Int J Eat Disord 2009 相似文献
6.
7.
8.
女性飞行学员高空飞行生理生化耐受能力研究 总被引:1,自引:0,他引:1
为从高空缺氧耐力训练前后生理、生化角度探讨中国女飞行员驾驶战斗机的可行性,在地面模拟高空缺氧及高空飞行训练前后行心电图、心率、血氧饱和度、血压、血尿酸(BUA)、肌酸激酶(CK)、血红蛋白(Hb)、乳酸(BLA)、肌酐(Cr)和天冬氨酸转氨酶(AST)测定,并与男飞行学员的测定结果比较.发现男女飞行学员的心电图、心率、血氧饱和度、血压、Cr、CK、BUA和AST均无显著性差异;女飞行学员在高空耐缺氧Hb代偿反应高于男飞行学员(P<0.05),而BLA水平低于男飞行学员(P<0.05).认为中国女飞行学员在生理生化耐受能力上能胜任飞战斗机. 相似文献
9.
Maria Råstam Christopher Gillberg Jan Wahlström† 《Journal of child psychology and psychiatry, and allied disciplines》1991,32(4):695-701
Forty-seven cases with anorexia nervosa (including a total population group) and 47 sex-, age-, and school-matched comparison cases were subjected to chromosome analyses in a blind fashion. No major abnormalities were found in any of the cases. Sex chromatin was analysed in buccal smears from the girls. No differences between the anorexia nervosa and the comparison cases were found. It seems that chromosomal/sex chromatin analyses in anorexia nervosa are not warranted. 相似文献
10.
Diarrheal diseases have a well recognized negative effect on children's growth, probably due in part to reduced dietary intake during illness. Previous studies have shown that the effects of diarrhea on dietary intake are greater among hospitalized children than among those observed in their homes. Breast milk intake does not change during diarrhea, however, so breast-fed children are less likely to reduce their total energy and nutrient intakes. Recent analyses of clinical studies found that acidosis and dehydration were most closely associated with reduced dietary intake of hospitalized patients. The implications of these and other studies for the dietary management of patients during and after diarrhea are discussed. 相似文献