首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   5758篇
  免费   485篇
  国内免费   49篇
耳鼻咽喉   46篇
儿科学   147篇
妇产科学   120篇
基础医学   495篇
口腔科学   133篇
临床医学   741篇
内科学   1009篇
皮肤病学   87篇
神经病学   821篇
特种医学   94篇
外科学   412篇
综合类   194篇
一般理论   6篇
预防医学   1282篇
眼科学   66篇
药学   444篇
中国医学   23篇
肿瘤学   172篇
  2024年   17篇
  2023年   120篇
  2022年   141篇
  2021年   228篇
  2020年   265篇
  2019年   289篇
  2018年   255篇
  2017年   249篇
  2016年   274篇
  2015年   210篇
  2014年   274篇
  2013年   813篇
  2012年   253篇
  2011年   219篇
  2010年   215篇
  2009年   220篇
  2008年   241篇
  2007年   225篇
  2006年   244篇
  2005年   203篇
  2004年   185篇
  2003年   177篇
  2002年   155篇
  2001年   117篇
  2000年   94篇
  1999年   81篇
  1998年   89篇
  1997年   76篇
  1996年   53篇
  1995年   63篇
  1994年   32篇
  1993年   36篇
  1992年   32篇
  1991年   30篇
  1990年   19篇
  1989年   12篇
  1988年   9篇
  1987年   10篇
  1986年   5篇
  1985年   10篇
  1984年   11篇
  1983年   2篇
  1982年   7篇
  1981年   7篇
  1980年   8篇
  1979年   2篇
  1978年   2篇
  1977年   6篇
  1976年   2篇
  1975年   5篇
排序方式: 共有6292条查询结果,搜索用时 15 毫秒
991.
Background: Alcohol consumption and its related consequences are not equal for women and men, although related studies do not frequently include gender analysis. Objective: Our aim was to characterize differences in endorsement of ICD-10 and DSM 5 alcohol use disorder (AUD) criteria by gender in an Argentinean emergency department population. Methods: A probability sample of patients (N = 923) from the largest emergency department in the city of Mar del Plata, Argentina (44% were females, aged 16 to 86, M (SD) = 37.31(15.20) was collected. Using a structured questionnaire, diagnostic criteria for alcohol use disorders, alcohol consumption, and socio-demographic variables were obtained. Bivariate and multivariate analyses were used to assess differences in the endorsement of each diagnostic criterion by gender. Results: Women were less likely to endorse each of the criteria for each of the diagnostic schemes. Even after controlling alcohol consumption, socio-demographic variables, severity of alcohol use disorders and adjusting for multiple comparisons females had a lower probability than males of endorsing withdrawal and impaired control. Conclusions: gender differences in the endorsement of diagnostic criteria for both the DSM 5 and ICD-10 were found. Some differences in endorsement but not all, might be partially explained by alcohol consumption patterns and socio-demographic factors, and same remained after controlling severity of the AUD. Results also suggest a differential functioning of DSM 5 and ICD-10 AUD criteria for women and men.  相似文献   
992.
Background: The empirical research examining substance use among sexual minority collegiate athletes is sparse. Problematically, this group may be at a greater risk of substance use due to their marginalized status within the context of sport. Objectives: We examined different types of substance use during the past 30 days, and diagnosis of substance use disorders during the past 12 months, among sexual minority collegiate athletes. Methods: This study uses data from college students for the fall semester between 2008 and 2012 from the American College Health Association-National College Health Assessment. Results: Sexual minority collegiate athletes had greater odds of past 30-day cigarette use, past 30-day alcohol use, past 30-day marijuana use, and indicating being diagnosed or treated for a substance use disorder during the past 12 months when compared to either heterosexual collegiate athletes or heterosexual nonathletes, but had similar odds on these outcomes when compared to sexual minority nonathletes. Sexual minority collegiate athletes also had greater odds of binge drinking during the past 2 weeks when compared to either heterosexual nonathletes or sexual minority nonathletes, but had similar odds on this outcome when compared to heterosexual collegiate athletes. Additional analyses by gender reveal that male sexual minority athletes are at the greatest risk of being diagnosed or treated for a substance use disorder. Conclusions: Possible explanations as to why sexual minority collegiate athletes (particularly males) may be at a greater risk of substance use disorders could include the difficulty of trying to maintain an athletic identity within a social environment that is traditionally homophobic.  相似文献   
993.
The incidence of cardiovascular disease is rising as the population ages. This has led to an increase in the need to perform cardiac surgery in older patients. However, aged hearts are particularly susceptible to reperfusion injury following periods of myocardial ischaemia that occur during cardiac surgery. Indeed, older adults experience myocardial dysfunction and reduced survival post‐surgery compared to younger people and certain groups, including older women and frail older adults, are at particular risk. This highlights the need to design cardioprotective strategies specifically for the ageing heart. Cardioprotection during surgery is often accomplished by perfusing the heart with chemical arresting agents, known as cardioplegic solutions. New protective strategies have been developed and tested in animal models, where cardioplegic solutions have been modified by changing their temperature, chemical components and/or the frequency of delivery. In addition, drugs designed to activate cardioprotective mechanisms or to inhibit mechanisms involved in injury have been added to improve the efficacy of these solutions. However, most experimental studies have developed and optimized cardioplegic solutions in hearts from younger male animals. This review discusses pre‐clinical models used to optimize cardioplegic solutions, with an emphasis on the few studies that have used hearts from older animals. Pharmacologic agents that have been shown to enhance the benefits of cardioplegia in younger hearts and could, in theory, protect vulnerable older hearts are also considered. We emphasize the need to conduct studies in frail older animals of both sexes to facilitate translation of laboratory‐based observations to the clinic.  相似文献   
994.
This study investigated the relationship between children's attitudes towards reading and their parents’ gendered views about literacy (GVL). It was assumed that parents may have GVL by favouring girls in reading activities, which could limit boys’ enjoyment in reading activities. This study was conducted with 31 five-year-old children in first term at a school in South Australia. To measure children's enjoyment in reading-related activities, each child completed an individually administered Literacy Attitude Scale (LAS). Parents completed a questionnaire about their views on girls’ and boys’ early literacy and their book preferences. It was found that the parents’ GVL were significantly and negatively related to children's attitudes towards reading. Importantly, both male and female children of parents, with highly GVL, exhibited lower attitudes towards reading. Overall, girls reported significantly more positive attitudes towards reading than boys. A weak but notable correlation was found between parents’ perceptions about their children's attitudes towards reading and their children's self-reported reading attitudes.  相似文献   
995.
The nitrate (NO3?) present in beetroot juice (BJ) has been studied for its effect on the cardiovascular system by converting to nitric oxide (NO). In the present study, we evaluated the effect of BJ on the excretion of NO metabolites and its relationship with body mass in both men and women. NO metabolites – urinary NO3?, nitrite (NO2?) and NOx were analyzed by using a high-performance liquid chromatography system. There were significant increases in urinary NO3?, NO2? and NOx in BJ as compared to PLA (BJ without NO3?). No significant difference between men and women was observed in NO metabolites after BJ at any time point. There were no significant relationships between urinary NO3?, NO2? and NOx and body mass in BJ intervention for both men and women. In conclusion, urinary NO metabolites after BJ consumption increases in similar manner between sexes regardless of body mass.  相似文献   
996.
997.
Gender expansive individuals of all ages are at an elevated risk for mental and physical health problems compared not only to the general population, but also to lesbian, gay, and bisexual individuals. Yet mental healthcare providers tend to be underprepared to provide services to this population, which is due in part to the dearth of scholarship on how to provide competent care to gender-expansive people. The present article introduces themes and terminology crucial to working with this population, as well as three case studies—two individuals and one family—highlighting the nuances inherent in workng with gender expansive clients. We conclude by offering ways to conceptualize each case, and by highlighting certain areas that we believe deserve specific considerations from care providers.  相似文献   
998.
AIMS: To assess the clinical characteristics, management and outcome of women compared to men with acute myocardial infarction or ischaemia. DESIGN: A prospective clinical survey was made in a random sample of 94 District General Hospitals in the U.K. 1064 patients, <70 years of age, comprising six consecutive females and six consecutive males from each hospital, diagnosed on admission as acute coronary syndromes (myocardial infarction or myocardial ischaemia) were studied. Outcome measures included: admission and final diagnosis, time to delivery of care, inpatient management, complications and clinical outcome. RESULTS: Five hundred and three women and 561 men were admitted with a diagnosis of acute myocardial infarction or myocardial ischaemia. Women were older, waited longer between seeking and receiving advice, and much less likely to have infarction than men. After adjustment for age, diagnosis and past medical history there were no gender differences in initial and subsequent hospital management, in complications (recurrent ischaemia, arrhythmias, temporary pacing, heart failure), any routine procedure or outcome. Of all patients, 3.4% died in a District General Hospital, 12.2% were transferred to Specialist Cardiac Centres and 84.4% discharged home. Prophylactic medication on discharge was similar for men and women. CONCLUSION: After adjustment for age, diagnosis and past medical history, although women waited longer between seeking and receiving medical advice, in hospital their assessment, management, complications, outcome and follow-up arrangements were the same as for men. In hospital, management and outcomes were mainly influenced by age, diagnosis (infarction or ischaemia), a past history of coronary disease, but not by gender. This large, nationally representative, survey has found no evidence of important gender difference in the hospital management of acute ischaemic syndromes.  相似文献   
999.
Theoretical models suggest that many diverse psychosocial factors contribute to the etiology of substance use among youth. It has been suggested that substance use is a function of the total number of etiologic factors, rather than a specific type or set of factors. This study examined whether cumulative psychosocial risk and protection measured in the 7th grade predicted alcohol use in the 9th grade across ethnically diverse samples of adolescents. Participants consisted of black (n = 775) and Hispanic (n = 467) inner-city youth and white suburban youth (n = 708). Prevalence rates for alcohol use and risk/protection varied more widely based on ethnic group compared to gender. Black youth reported the fewest risk factors and lowest levels of alcohol use, white youth reported the most risk factors and highest levels of alcohol use, and Hispanic youth reported the fewest protective factors and intermediate levels of alcohol use. Despite these differences, structural equation modeling indicated that a latent factor consisting of cumulative risk, protection, and their interaction significantly predicted later alcohol use for the combined sample as well as for each ethnic/gender subgroup. However, the proportion of variance explained in alcohol use varied across subgroups, and moderator analyses indicated that protection significantly buffered the effects of risk differentially across subgroups. The strongest protective effects were observed among black inner-city youth. Findings suggest that prevention approaches should focus on enhancing protection in addition to reducing risk, particularly among youth with lower levels of psychosocial protection.  相似文献   
1000.
Recent advances in electronic health records and health information technology are providing new opportunities to improve the quality of care for transgender and gender diverse people, a population that experiences significant health disparities. This article recommends changes to electronic health record systems that have the potential to optimize gender-affirming care. Specifically, we discuss the importance of creating an anatomical inventory form that captures organ diversity, and of developing clinical decision support tools and population health management systems that consider each patient’s gender identity, sex assigned at birth, and anatomy.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号