全文获取类型
收费全文 | 20780篇 |
免费 | 1831篇 |
国内免费 | 64篇 |
专业分类
耳鼻咽喉 | 288篇 |
儿科学 | 651篇 |
妇产科学 | 445篇 |
基础医学 | 2598篇 |
口腔科学 | 283篇 |
临床医学 | 2508篇 |
内科学 | 3958篇 |
皮肤病学 | 264篇 |
神经病学 | 2536篇 |
特种医学 | 517篇 |
外科学 | 2264篇 |
综合类 | 345篇 |
一般理论 | 18篇 |
预防医学 | 2706篇 |
眼科学 | 323篇 |
药学 | 1605篇 |
中国医学 | 8篇 |
肿瘤学 | 1358篇 |
出版年
2023年 | 161篇 |
2022年 | 185篇 |
2021年 | 450篇 |
2020年 | 351篇 |
2019年 | 527篇 |
2018年 | 566篇 |
2017年 | 457篇 |
2016年 | 508篇 |
2015年 | 496篇 |
2014年 | 669篇 |
2013年 | 1027篇 |
2012年 | 1401篇 |
2011年 | 1454篇 |
2010年 | 765篇 |
2009年 | 614篇 |
2008年 | 1121篇 |
2007年 | 1247篇 |
2006年 | 1076篇 |
2005年 | 1062篇 |
2004年 | 1035篇 |
2003年 | 949篇 |
2002年 | 859篇 |
2001年 | 297篇 |
2000年 | 289篇 |
1999年 | 275篇 |
1998年 | 217篇 |
1997年 | 168篇 |
1996年 | 180篇 |
1995年 | 149篇 |
1994年 | 132篇 |
1993年 | 146篇 |
1992年 | 237篇 |
1991年 | 221篇 |
1990年 | 204篇 |
1989年 | 175篇 |
1988年 | 177篇 |
1987年 | 178篇 |
1986年 | 166篇 |
1985年 | 182篇 |
1984年 | 199篇 |
1983年 | 167篇 |
1982年 | 160篇 |
1981年 | 153篇 |
1980年 | 119篇 |
1979年 | 122篇 |
1978年 | 145篇 |
1977年 | 106篇 |
1976年 | 113篇 |
1975年 | 118篇 |
1974年 | 100篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Joseph M. Northey Kate L. Pumpa Clare Quinlan Ashley Ikin Kellie Toohey Disa J. Smee Ben Rattray 《Journal of Science and Medicine in Sport》2019,22(5):580-585
Objectives
The current study investigated the effects of two exercise interventions on cognitive function amongst breast cancer survivors.Design
Pilot randomised-controlled trial.Methods
Seventeen female cancer survivors (mean: 62.9 ± 7.8 years) were randomised into three groups: high-intensity interval training (HIIT, n = 6); moderate-intensity continuous training (MOD, n = 5); or wait-list control (CON, n = 6). The HIIT and MOD groups exercised on a cycle ergometer 3 days/week for 12-weeks. Primary outcomes were cognitive function assessments utilising CogState. Secondary outcomes were resting middle cerebral artery blood flow velocity, cerebrovascular reactivity and aerobic fitness (VO2peak). Data were analysed with General Linear Mixed Models and Cohen’s d effect sizes were calculated.Results
All 17 participants who were randomised were available for follow-up analysis and adherence was similar for HIIT and MOD (78.7 ± 13.2% vs 79.4 ± 12.0%; p = 0.93). Although there were no significant differences in the cognitive and cerebrovascular outcomes, HIIT produced moderate to large positive effects in comparison to MOD and CON for outcomes including episodic memory, working memory, executive function, cerebral blood flow and cerebrovascular reactivity. HIIT significantly increased VO2peak by 19.3% (d = 1.28) and MOD had a non-significant 5.6% (d = 0.72) increase, compared to CON which had a 2.6% decrease.Conclusions
This study provides preliminary evidence that HIIT may be an effective exercise intervention to improve cognitive performance, cerebrovascular function and aerobic fitness in breast cancer survivors. Considering the sample size is small, these results should be confirmed through larger clinical trials. 相似文献5.
Interaction effects between the 5‐hydroxy tryptamine transporter‐linked polymorphic region (5‐HTTLPR) genotype and family conflict on adolescent alcohol use and misuse 下载免费PDF全文
6.
7.
8.
9.
Harvey A. Siegal PhD ; Paul J. Draus PhD ; Robert G. Carlson PhD ; Russel S. Falck MA ; Jichuan Wang PhD 《The Journal of rural health》2006,22(2):169-173
CONTEXT: Although the nonmedical use of stimulant drugs such as cocaine and methamphetamine is increasingly common in many rural areas of the United States, little is known about the health beliefs of people who use these drugs. PURPOSE: This research describes illicit stimulant drug users' views on health and health-related concepts that may affect their utilization of health care services. METHODS: A respondent-driven sampling plan was used to recruit 249 not-in-treatment, nonmedical stimulant drug users who were residing in 3 rural counties in west central Ohio. A structured questionnaire administered by trained interviewers was used to collect information on a range of topics, including current drug use, self-reported health status, perceived need for substance abuse treatment, and beliefs about health and health services. FINDINGS: Participants reported using a wide variety of drugs nonmedically, some by injection. Alcohol and marijuana were the most commonly used drugs in the 30 days prior to the interview. Powder cocaine was used by 72.3% of the sample, crack by 68.3%, and methamphetamine by 29.7%. Fair or poor health status was reported by 41.3% of the participants. Only 20.9% of the sample felt they needed drug abuse treatment. Less than one third of the sample reported that they would feel comfortable talking to a physician about their drug use, and 65.1% said they preferred taking care of their problems without getting professional help. CONCLUSIONS: Stimulant drug users in rural Ohio are involved with a range of substances and hold health beliefs that may impede health services utilization. 相似文献
10.
Kate Ridley Tim S Olds Alison Hill 《The international journal of behavioral nutrition and physical activity》2006,3(1):10-11