全文获取类型
收费全文 | 4912篇 |
免费 | 227篇 |
国内免费 | 27篇 |
专业分类
耳鼻咽喉 | 22篇 |
儿科学 | 204篇 |
妇产科学 | 72篇 |
基础医学 | 572篇 |
口腔科学 | 46篇 |
临床医学 | 413篇 |
内科学 | 354篇 |
皮肤病学 | 21篇 |
神经病学 | 901篇 |
特种医学 | 23篇 |
外科学 | 66篇 |
综合类 | 517篇 |
预防医学 | 1204篇 |
眼科学 | 10篇 |
药学 | 613篇 |
中国医学 | 91篇 |
肿瘤学 | 37篇 |
出版年
2023年 | 38篇 |
2022年 | 81篇 |
2021年 | 137篇 |
2020年 | 140篇 |
2019年 | 118篇 |
2018年 | 109篇 |
2017年 | 102篇 |
2016年 | 136篇 |
2015年 | 105篇 |
2014年 | 262篇 |
2013年 | 317篇 |
2012年 | 297篇 |
2011年 | 375篇 |
2010年 | 267篇 |
2009年 | 246篇 |
2008年 | 278篇 |
2007年 | 301篇 |
2006年 | 242篇 |
2005年 | 183篇 |
2004年 | 167篇 |
2003年 | 118篇 |
2002年 | 104篇 |
2001年 | 94篇 |
2000年 | 81篇 |
1999年 | 68篇 |
1998年 | 67篇 |
1997年 | 39篇 |
1996年 | 28篇 |
1995年 | 43篇 |
1994年 | 22篇 |
1993年 | 22篇 |
1992年 | 29篇 |
1991年 | 23篇 |
1990年 | 22篇 |
1987年 | 23篇 |
1985年 | 31篇 |
1984年 | 26篇 |
1983年 | 23篇 |
1982年 | 32篇 |
1981年 | 32篇 |
1980年 | 24篇 |
1979年 | 24篇 |
1978年 | 21篇 |
1977年 | 21篇 |
1976年 | 41篇 |
1975年 | 30篇 |
1974年 | 25篇 |
1973年 | 32篇 |
1972年 | 22篇 |
1971年 | 23篇 |
排序方式: 共有5166条查询结果,搜索用时 776 毫秒
1.
《Vaccine》2020,38(46):7372-7378
BackgroundTheories of health behavior change are being inadequately adopted to understand the reasons behind low influenza vaccination rates among healthcare workers (HCWs). The Theory of Planned Behavior (TPB) is being used to predict intention-behavior relationship while the Health Belief Model (HBM) is being employed to predict actual behavior. The purpose of this study was to test a conceptual model based on the HBM’s constructs to predict Jordanian HCWs’ intentions for influenza vaccine uptake as an alternative to the TPB.MethodA cross-sectional questionnaire-based study was conducted in 2016 in a tertiary teaching hospital in Amman-Jordan including a convenience sample of 477 HCWs with direct patient contact. The study instrument was tested for validity and reliability. A conceptual regression model was proposed incorporating the constructs of the primary HBM with some modifications in the threat construct as well as an additional variable about explicit past vaccination behavior (in the past year and/or any previous history of influenza vaccine uptake).ResultsAlmost all the constructs of the HBM demonstrated significant differences between participants intending and those who did not intend to vaccinate against influenza. After adjusting for the confounding variables in the final conceptual regression model, past vaccination behavior (OR= 4.50, 95%Confidence Interval 3.38–6.00, P< 0.0005) and the perceived benefit scale (OR= 1.19, 95% Confidence Interval 1.11–1.28, P< 0.0005) were the only significant predictors of intentions to vaccinate against influenza in the next season.ConclusionTaking into consideration the altruistic beliefs of HCWs and their explicit past vaccination history augments the utility of the original HBM tool in predicting HCWs’ intentions to vaccinate against influenza in a way that is consistent with the predictive ability of the Theory of Planned Behavior. 相似文献
2.
Restricted and repetitive behaviors (RRBs) constitute a core symptom of autism spectrum disorder (ASD). The Repetitive Behavior Scale-Revised (RBS-R) is a widely used questionnaire administered by parents or caregivers to assess RRBs in individuals with ASD. This study evaluated the psychometric properties of the RBS-R Japanese Version (RBS-R-J). The ASD and non-ASD groups comprised 274 and 36 participants, respectively. We examined corrected item-total correlation, Cronbach's alpha, and RBS-R-J scores of different diagnostic groups, as well as correlations between RBS-R-J scores and intelligence quotient (IQ), autistic symptoms, adaptive/maladaptive functioning, aberrant behaviors, and sensory processing. All items showed moderate corrected item-total correlations. Cronbach's alpha coefficient was .93. We found significant differences in the mean RBS-R-J scores of the low-functioning ASD group and the intellectual disabilities group, and of low-functioning and high-functioning ASD groups. RBS-R-J scores negatively correlated with IQ and scores on the Sensory Profile (Japanese version) and Adaptive Behavior Composite of the Maladaptive Behavior Index of the Vineland Adaptive Behavior Scales-Second Edition (VABS-II; Japanese version), but positively correlated with scores on the peak and current symptoms subscales of the Pervasive Developmental Disorders Autism Society Japan Rating Scale, the VABS-II, and the Aberrant Behavior Checklist-Community (Japanese version). From these results, we conclude that RBS-R-J showed good reliability, diagnostic validity, and convergent validity, indicating that it is a reliable, valid instrument for use among ASD individuals in clinical and research settings. 相似文献
3.
《Annals of hepatology》2019,18(4):563-570
Introduction and ObjectivesNonalcoholic fatty liver disease (NAFLD) can be considered one of the most common causes of liver disease in our days and is regarded as one of the newest vascular risk factors for cerebrovascular and other neurological diseases.Materials and methodsWe studied a group of neurological outpatients, divided into two homogenous groups based on the presence or absence of NAFLD.Results and conclusionsWe testified an independent relationship between NAFLD and common vascular risk factors (age, sex, educational level, BMI, cholesterol and lipid assessment, Hb1ac). At the same time, we ascertained an independent relationship between NAFLD and more recently recognized vascular risk factors, such as lack of folate, vitamin B12 and vitamin D-OH25, and increased levels of homocysteine. Finally, we have documented that NAFLD showed worse executive and frontal functions, and behavioral changes, such as depressive mood and anxiety, and apathy. 相似文献
4.
《Journal of Science and Medicine in Sport》2019,22(9):1038-1043
ObjectivesGrowing evidence of the importance of motor competence for developing a healthy lifestyle has been established in the last decade. Nonetheless, no single instrument or observation tool have been able to fully measure this construct, particularly because most were built for the diagnosis of children in risk for motor impairment; are limited to a few years of the developmental span; lack objectivity in the assessment protocols; or do not include the locomotor, stability, and manipulative components. This led to the difficulty of comparing researches, and longitudinally follow children into adulthood. Recently, a novel proposal to assess motor competence was presented - the Motor Competence Assessment (MCA) - and this study aims to present the MCA normative data from 3-to-23 years.Design and methodsTwo thousand and eighty-seven participants (1102 boys) between 3 and 23 years of age were evaluated in the MCA (standing long jump, 10 m shuttle run, throwing velocity, kicking velocity, lateral jumps, shifting platforms). Results for each test were introduced in the LMS Chartmaker 2.3. The best model for test and sex was used, resulting in normative curves and percentile values.ResultsFinal norms showed a good fit to the instrument developmental expectations, allowing to differentiate and classify performances along the age interval.ConclusionsThe MCA age- and sex- normative values allow to assess motor competence from childhood to early adulthood. Future directions will include obtaining a total MCA score and the normative scores for the MCA components (stability, locomotion, object control), and to expand the norms to adulthood and old age. 相似文献
5.
《The journal of sexual medicine》2020,17(7):1225-1228
BackgroundIn March 2020, the World Health Organization declared coronavirus disease 2019 (COVID-19), which is caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), a pandemic. Currently, data on changes in sexual behavior during the COVID-19 outbreak are limited.AimThe present study aimed to obtain a preliminary understanding of the changes in people's sexual behavior, as a result of the pandemic, and explore the context in which they manifest.MethodsA convenience sample of 270 men and 189 women who completed an online survey consisting of 12 items plus an additional question were included in the study.OutcomesThe study outcomes were obtained using a study-specific questionnaire to assess the changes in people's sexual behavior.ResultsWhile there was a wide range of individual responses, our results showed that 44% of participants reported a decrease in the number of sexual partners and about 37% of participants reported a decrease in sexual frequency. Multiple regression analysis showed that age, partner relationship, and sexual desire were closely related to sexual frequency. In addition, we found that most individuals with risky sexual experiences had a rapid reduction in risky sexual behavior.Clinical ImplicationsThe current findings contribute to identifying another potential health implication associated with the COVID-19 pandemic and report preliminary evidence of the need to provide potential interventions for the population.Strength & LimitationsThis study is the first to perform a preliminary exploration of sexual behavior during the COVID-19 outbreak. The generalizability of the results is limited, given that only a small convenience sample was used.ConclusionDuring the height of the COVID-19 outbreak, overall sexual activity, frequency, and risky behaviors declined significantly among young men and women in China.Li W, Li G, Xin C, et al. Challenges in the Practice of Sexual Medicine in the Time of COVID-19 in China. J Sex Med 2020;17:1225–1228. 相似文献
6.
目的对综合的行为分析的理论和治疗的应用研究段计进行论证。方法音乐心理学是周用桓辩院模式的理论基础。“税书”是医疗、教育、工疗和娱疗的新四结合治疗的灵魂。结果音乐心理行为治疗促进了病房秩序,方便了譬疗工作的开展井有益于精神康复,提高了患者的自信心.强化了正常行为。结论音乐心理行为治疗是公认的行之有效的康复治疗的方法之一。可帮助慢性精神分裂症患者接受正常社会生活和唤醒他们潜在的正常精神功能。 相似文献
7.
邹城市预防艾滋病健康教育效果评价 总被引:6,自引:4,他引:2
目的评价预防艾滋病健康教育与行为干预效果。方法采用问卷方式对社区居民进行预防艾滋病信息的可及性及知信行的调查。结果社区居民艾滋病知晓率为97.41%,熟悉艾滋病传播途径的87.78%,62.78%的认为艾滋病病人或感染者和正常人享有一样的入学/就业权,38.70%的人愿意与感染艾滋病的同事继续共事,60.19%的人愿意与感染艾滋病的家人继续共同生活,最近3次性行为100%使用安全套者为26.48%,82.04%的人有医疗用血安全意识,64.81%的人有医疗器械安全意识。最想获取艾滋病预防措施、传播途径、病理知识、症状表现、治疗方法、检测途径及检测方法、疫情信息,新闻、电视公益广告、专题报道、反映艾滋病病人生活的电影或电视剧、科普材料、大型公益演出人们最喜欢。结论政府重视,多部门合作,组织机构健全,宣传教育广泛,干预措施到位,成效显著。 相似文献
8.
Neil Harrington 《Cognitive therapy and research》2006,30(6):699-709
Beliefs regarding the toleration of frustration and discomfort are often described as underlying psychological disturbance, and represent a fundamental concept in Rational Emotive Behavior Therapy (REBT). Nevertheless, there has been little systematic analysis of the content of these beliefs, which are often treated as a unidimensional construct. This paper investigates the relationship between a multidimensional Frustration Discomfort Scale (FDS) and measures of depressed mood, anxiety, and anger, in a clinical population. Results indicated that FDS sub-scales were differentially related to specific emotions, independent of self-esteem and negative affect. The entitlement sub-scale was uniquely associated with anger, discomfort intolerance with depressed mood, and emotional intolerance with anxiety. These results supported the validity of the FDS, the importance of distinguishing between frustration intolerance dimensions, and of separating these beliefs from those related to self-worth.Copies of the Frustration Discomfort Scale are available from the author on request 相似文献
9.
林规茂 《中国医疗器械信息》2005,11(6):29-32
在系统水平上研究人脑的睡眠过渡过程,以寻求监测睡眠过渡过程的新方法.方法:让15名睡眠良好者进行睡眠中的行为反应实验,获取行为反应量.结果:发现行为反应量与脑电图所反映的脑状态一致,且能反应睡眠过渡过程中脑状态的微小变化.结论:以行为反应量监测睡眠过渡过程,结果可靠,操作简便,对被试者干扰小. 相似文献
10.