全文获取类型
收费全文 | 6991篇 |
免费 | 898篇 |
国内免费 | 79篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 840篇 |
妇产科学 | 123篇 |
基础医学 | 530篇 |
口腔科学 | 187篇 |
临床医学 | 913篇 |
内科学 | 628篇 |
皮肤病学 | 67篇 |
神经病学 | 853篇 |
特种医学 | 100篇 |
外科学 | 333篇 |
综合类 | 410篇 |
现状与发展 | 1篇 |
一般理论 | 2篇 |
预防医学 | 2184篇 |
眼科学 | 73篇 |
药学 | 406篇 |
5篇 | |
中国医学 | 35篇 |
肿瘤学 | 268篇 |
出版年
2024年 | 46篇 |
2023年 | 231篇 |
2022年 | 239篇 |
2021年 | 378篇 |
2020年 | 433篇 |
2019年 | 470篇 |
2018年 | 394篇 |
2017年 | 410篇 |
2016年 | 314篇 |
2015年 | 328篇 |
2014年 | 406篇 |
2013年 | 822篇 |
2012年 | 376篇 |
2011年 | 400篇 |
2010年 | 319篇 |
2009年 | 326篇 |
2008年 | 279篇 |
2007年 | 288篇 |
2006年 | 220篇 |
2005年 | 175篇 |
2004年 | 154篇 |
2003年 | 146篇 |
2002年 | 101篇 |
2001年 | 87篇 |
2000年 | 105篇 |
1999年 | 54篇 |
1998年 | 77篇 |
1997年 | 65篇 |
1996年 | 63篇 |
1995年 | 46篇 |
1994年 | 22篇 |
1993年 | 27篇 |
1992年 | 24篇 |
1991年 | 23篇 |
1990年 | 19篇 |
1989年 | 13篇 |
1988年 | 18篇 |
1987年 | 17篇 |
1986年 | 6篇 |
1985年 | 15篇 |
1984年 | 7篇 |
1983年 | 6篇 |
1982年 | 8篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1977年 | 3篇 |
1975年 | 3篇 |
1971年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有7968条查询结果,搜索用时 0 毫秒
31.
Yifat Cohen Anthony Spirito Cheryl Sterling Deidre Donaldson Ronald Seifer Barry Plummer Ruscinda Avila Kathy Ferrer 《Journal of child psychology and psychiatry, and allied disciplines》1996,37(8):989-993
Adolescents who were psychiatrically hospitalized ( N = 105) were classified as sexually abused, physically abused, both sexually and physically abused, or not abused, and studied to determine the prevalence of suicidal behavior and psychiatric disorders. Self-reports of hopelessness, depression, coping, and self-concept were also examined. No difference in suicidal behavior or psychiatric disorder, based on abuse history, was found, with one exception. Adolescents who were sexually abused, particularly those who experienced the most severe sexual abuse, used negative coping strategies more often than those not sexually abused. Findings suggest that symptomatology of adolescents who are psychiatrically hospitalized does not differ markedly based on history of abuse. 相似文献
32.
This introduction traces the increasing awareness of the prevalence of child sexual abuse over the last 20 years, examines the nature and consequences of such abuse and summarizes current information on the use of group treatment and its evaluation with sexually abused children and adolescents and their parents. Four examples of group treatment with different populations of abused children are described in this issue. 相似文献
33.
The Equal Environments Assumption (EEA) in twin studies of eating pathology was investigated by examining the hypothesis that twin resemblance for eating attitudes and behaviors is affected by their degree of physical similarity. Eating attitudes and behaviors were assessed in 338 female adolescent twin pairs with a revised version of the Eating Disorder Inventory (EDI). General physical similarity as well as body size/shape similarity were assessed using ratings of color photographs, ratings of body shape, and body mass index. All physical similarity assessments were conducted blind to twin zygosity. Significant associations between physical similarity and twin similarity for eating attitudes and behaviors were not found. Mean EDI within-twin pair absolute difference scores did not differ significantly among more versus less physically-similar groups. Additionally, correlation and regression analyses failed to find a significant association between EDI absolute difference scores and physical similarity indices. The current findings provide support for the EEA in twin studies of eating attitudes and behaviors. 相似文献
34.
Paul E. Baer Lisa Berg Garmezy Robert J. McLaughlin Alex D. Pokorny Mark J. Wernick 《Journal of behavioral medicine》1987,10(5):449-466
This study examined alcohol use among seventh graders in relation to life events, daily hassles, the supportive quality of the family environment, coping, and anxiety. Four hundred twenty-five students participated, 228 girls and 197 boys. Stepwise regression and discriminant function analyses indicated that the students reported more alcohol use if they also reported more life events, more daily hassles, and more conflict in the family. A stress-buffering effect of low family conflict on life events could not be substantiated for extent of alcohol use. The results are discussed in the context of the developmental transitions of adolescence. 相似文献
35.
RADS抑郁量表的修订 总被引:5,自引:3,他引:5
本文报导应用ReynoldsAdolescentDepressionscale(RADS)抑郁量表在全国7省市对3905名中学生测量的结果,量表重测相关系数为0.79、Cronbechα系数为0.88、分半信度相关系数为0.88;与流调中心用抑郁量表(CES-D)的相关系数为0.84;因子分析结果表明该量表有较好的结构效度。 相似文献
36.
目的 确定广西三江县侗族青少年头发中 9种人体必需元素含量的正常值。方法 用偏振塞曼原子吸收仪 ,检测了来自三江县的 993名 7~ 16岁中小学生头发中镍、硒、钴、铬、铁、锌、钙、铜和镁 9种人体必需元素的含量 ,并用SPSS统计软件进行统计分析。结果 广西三江县侗族中小学生头发中 ,镍、硒、钴、铬、铁、锌、钙、铜和镁 9种人体必需元素的含量没有性别差异 ;硒、铬、铁、锌、钙和铜与年龄呈负相关 ;制订了镍、硒、钴、铬、铁、锌、钙、铜、镁 9种元素的头发含量的正常值范围。结论 广西三江县中学生头发中硒、铬、铁、锌、钙和铜含量有明显年龄差异 ,而镍、钴和镁却没有年龄差异。 相似文献
37.
目的:编制一个用于儿童和青少年的心理问题筛查表,检验其信度和效度。方法:用新编的心理问题筛查表测查全国12个省(市)9278名儿童或他们的父母和143名临床样本,间隔5周的重测样本87人,父母和儿童报告一致性检验样本56人,效标效度样本65人。用相关分析和因素分析考查量表的信度和效度。结果:新编筛查表具有较好的信度(重测信度为0.761、Crobacha系数为0.949、分半信度为0.868、评定者信度为0.799);正常儿童在筛查表上的得分显著高于临床样本的得分;新编筛查表总分和分量表与儿童行为量表总分和类似分量表有显著的相关:探索性因素分析和验证性斟素分析与量表编制者的理论构想一致。结论:儿少心理健康量表具有较好的信度和效度.可以用于儿童和青少年的心理问题的筛查. 相似文献
38.
Niels Jrgensen Jrn Müller Aleksander Giwercman Jakob Visfeldt Henrik Mller Niels E. Skakkebk 《The Journal of pathology》1995,176(3):269-278
The origin of testicular germ cell tumours occurring during childhood is poorly understood. In adults, the classical seminomas and non-seminomas originate from carcinoma in situ of the testis, which can usually also be detected in seminiferous tubules adjacent to the tumours. In order to contribute with information regarding a possible association between carcinoma in situ and the childhood group of germ cell tumours, we investigated seminiferous tubules adjacent to 13 infantile yolk sac tumours, five infantile teratomas, and six adolescent germ cell tumours of various types, using morphological evaluation, immunohistochemical staining with markers for carcinoma in situ cells, and densitometric DNA measurement of the germ cells. We detected clear differences between the germ cell populations adjacent to adolescent and infantile germ cell tumours. The former were associated with both normal germ cells and carcinoma in situ cells. The presence of carcinoma in situ cells strongly suggested that the adolescent tumours arose from carcinoma in situ cells, like germ cell tumours occurring in adult men. Although we were in doubt in two cases, the infantile germ cell tumours were in general not associated with carcinoma in situ cells. The aetiology of infantile yolk sac tumours and teratomas may therefore be fundamentally different from that of adolescent and adult germ cell tumours. The origin of yolk sac tumours and teratomas remains to be elucidated. 相似文献
39.
目的 调查河南省儿童青少年遗尿症的情绪和行为问题的现况及其影响因素。 方法 从2019年10月—2020年3月,采用分层随机整群抽样方法抽取河南某县5所中小学校,采用一般资料调查表、长处和困难问卷及儿童睡眠调查表进行调查,对影响遗尿患儿情绪和行为的因素进行单因素、多因素分析。 结果 实际发放问卷4 500份,回收4 120份,有效问卷3 912份,有效回收率为94.95%。调查结果显示有7.82%儿童患有遗尿症。遗尿组的情绪症状、多动和困难总分得分明显高于正常组(P<0.001),两组品行问题、同伴交往和社会行为得分的比较差异无统计学意义(P>0.05)。Pearson相关分析结果显示,遗尿儿童和青少年的困难总分与打鼾、夜间呼吸问题、嗜睡、注意力缺陷、睡眠总分均存在正相关关系(P<0.05)。多元线性回归结果显示睡眠呼吸紊乱、照顾者文化程度低、便秘、学习成绩较差是遗尿患儿情绪和行为问题的影响因素。 结论 遗尿患儿情绪和行为问题的检出率高,影响因素是睡眠呼吸紊乱、照顾者文化程度低、孩子学习成绩差、便秘,应引起关注。 相似文献
40.