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   11994篇
  免费   455篇
  国内免费   30篇
耳鼻咽喉   31篇
儿科学   237篇
妇产科学   151篇
基础医学   1553篇
口腔科学   71篇
临床医学   1287篇
内科学   800篇
皮肤病学   62篇
神经病学   2526篇
特种医学   104篇
外科学   315篇
综合类   1126篇
一般理论   14篇
预防医学   3144篇
眼科学   18篇
药学   867篇
  5篇
中国医学   76篇
肿瘤学   92篇
  2023年   206篇
  2022年   407篇
  2021年   530篇
  2020年   504篇
  2019年   518篇
  2018年   413篇
  2017年   389篇
  2016年   405篇
  2015年   375篇
  2014年   924篇
  2013年   1168篇
  2012年   750篇
  2011年   929篇
  2010年   688篇
  2009年   718篇
  2008年   671篇
  2007年   599篇
  2006年   416篇
  2005年   274篇
  2004年   238篇
  2003年   190篇
  2002年   130篇
  2001年   116篇
  2000年   92篇
  1999年   76篇
  1998年   50篇
  1997年   51篇
  1996年   36篇
  1995年   44篇
  1994年   31篇
  1993年   24篇
  1992年   21篇
  1991年   28篇
  1990年   19篇
  1988年   22篇
  1986年   19篇
  1985年   48篇
  1984年   44篇
  1983年   26篇
  1982年   30篇
  1981年   32篇
  1980年   32篇
  1979年   34篇
  1978年   24篇
  1977年   20篇
  1976年   20篇
  1975年   17篇
  1974年   24篇
  1973年   17篇
  1972年   12篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
目的 本研究调查新冠疫苗全面接种时期相关医务人员的职业倦怠状况,探讨个体因素以及社会支持对倦怠水平的影响。方法 在南京市12个行政区中随机抽取4个辖区的新冠疫苗集中接种点,将全部医务人员共428名作为研究对象进行问卷调查,问卷包括人口学特征、中文版职业倦怠量表和社会支持量表。结果 医务人员情感耗竭、人格解体、个人成就感降低维度得分分别为(17.99±7.89)、(7.20±3.52)和(12.07±5.30)分。多元线性回归分析结果显示,上司支持(β=-0.180, P< 0.05)、同事支持(β=-0.180, P< 0.05)为情感耗竭的保护因素,已婚、问诊岗位为情感耗竭的危险因素(β=0.161、β=0.095,P值均< 0.05),女性是人格解体的保护因素(β=-0.096,P< 0.05),亲友支持(β=-0.235, P< 0.05)是人格解体的保护因素,已婚是人格解体的危险因素(β=0.142,P< 0.05),同事支持(β=-0.168, P< 0.05)、亲友支持(β=-0.210, P< 0.05)、工龄(β=-0.154, P< 0.05)为个人成就感降低的保护因素,硕士学历是个人成就感降低的危险因素(β=0.126,P < 0.05)。结论 重视提高全方面社会支持,重点关注已婚、男性、硕士学历以及较短工龄医务人员的心理健康。  相似文献   
2.
Introduction: TikTok has gained increasing popularity over the past year. The social media may affect awareness and perceptions of betel quid (BQ) and smokeless tobacco (SLT) by utilizing content generated by TikTok users. The purpose of this study is to examine how BQ and SLT are portrayed on TikTok. Methods: The 28 most viewed hashtag-based keywords were used to identify popular BQ and SLT-related videos on TikTok (n=513) from June 2018 to September 2021. Two researchers independently coded the number of likes, shares, views, user category and themes. Results: A final sample of 513 videos containing BQ and SLT that met the study criteria were included. Collectively, these videos were viewed over 725 million times, with a median ‘view’ count of 17,300 (range 152–155,000,000) and a median ‘likes’ count of 831 (range 4–2,400,000) and a median ‘share’ count of 21 (range 0–48,400). Majority of the videos showed BQ and SLT use positively i.e promoting the product (390/513; 76%) and these had more than 686 million times views. Neutral depictions of BQ and SLT use were viewed 15 million times (72/513; 14%) and negative portrayals of BQ and SLT have been viewed 193 million times (105/808; 13%). The video themes included ‘life style’ (349/513; 68.0%), ‘marketing’ (62/513; 12.09%), ‘comedy’ (44/513; 8.6%), ‘warning’ (25/513; 4.87%), ‘awareness’ (12/513; 2.3%), ‘sports and other’ (12/513; 2.3%) and social events or culture (9/513; 1.75%). Conclusion: Our results demonstrated that video clips related to BQ and SLT on TikTok, a fast-growing, popular video-sharing platform among teens, which is available with no age restrictions has been viewed multiple times. Majority (76%) promoted these two products, that could be detrimental to oral health. Therefore, the age restrictions especially for the videos containing BQ and SLT is mandatory in order to reduce the potential exposure of adolescents/young adults.  相似文献   
3.
4.
BackgroundDental caries is the most common chronic childhood disease. Past studies revealed that grandparents provide their grandchildren with cariogenic foods and beverages (eg, those with free sugars and/or modified starches). Qualitative research can help identify what drives this phenomenon.ObjectiveOur aim was to examine mothers’ explanations for why grandparents in north central and central Appalachia give their grandchildren cariogenic foods and beverages.DesignA qualitative study on children’s oral health in Pennsylvania and West Virginia from 2018 through 2020 was performed. In-person, semi-structured interviews were conducted. Qualitative data from interviews were recorded, transcribed, and then coded using NVivo. Data analysis for this study was performed using thematic analysis with iterative theme development.Participants/settingThe participants were 126 mothers of children aged 3-5 years from West Virginia (n = 66) and Pittsburgh, PA (n = 60).Main outcome measuresMothers’ perspectives about why grandparents give their grandchildren cariogenic foods and beverages were analyzed.ResultsIn the study sample, 85% of mothers (n = 107/126) named at least 1 of their children’s grandparents as a member of their social network responsible for their children’s oral health. From these interviews, 85% of mothers (n = 91/107) discussed that grandparents gave their grandchildren cariogenic foods and beverages. The mothers described the following 4 themes to explain why grandparents gave their grandchildren cariogenic foods and beverages: privilege of the grandparent role; responsibilities of the grandparent role; symbol of care and affection; and limited consideration or understanding of the detrimental impact.ConclusionsGrandparents play a role in giving their grandchildren cariogenic foods and beverages, which could potentially contribute to childhood caries. Research is needed to develop effective social interventions to help some grandparents understand the implications of a cariogenic diet on their grandchildren’s oral health and/or decrease their provision of cariogenic foods and beverages.  相似文献   
5.
ObjectivesHealthy individuals from hereditary cancer families undergoing genetic testing for cancer susceptibility (GTC) report more distress when they perceive their social support as low and suppress their emotions. This study aimed to explore how suppressing emotions and perceiving others as unsupportive are related with cancer-risk distress.MethodsWe performed a regression-based mediation analysis to assess if expressive suppression mediates or is mediated by perceived social support in the relation with cancer-risk distress. Participants were 125 healthy adults aged over 18 (M = 36.07, SD = 12.86), mostly female (72,4%), who undergone GTC to assess the presence of hereditary breast and ovarian cancer or Lynch syndromes.ResultsControlling for age and gender, we found a moderate size indirect effect of social support on cancer-risk distress through expressive suppression (β = ?0.095) and a direct effect of expressive suppression on cancer-risk distress.ConclusionsWhen healthy individuals from hereditary cancer families perceive their social network as less responsive, they tend to not express their emotions, which relates to increased distress facing GTC.Practice implicationsPractitioners may assess cancer-risk related distress before the GTC and offer distressed individuals interventions focused on changing emotion regulation strategies in a safe group context.  相似文献   
6.
胡依    闵淑慧  郭芮绮  成晓芬  李贝 《现代预防医学》2022,(22):4112-4118
目的 了解流动老人基本公共卫生服务利用情况,以及社会融合对基本公共卫生服务利用的影响。方法 于2021年7—12月,采用方便抽样的方法,抽取广州市、深圳市、江门市452名流动老人进行问卷调查。采用二元logistic回归模型分析流动老人社会融合对建立健康档案、接受健康教育和老年人健康管理之间的影响。结果 在452名流动老人中,60.8%建立了居民健康档案,接受过健康教育和老年人健康管理的分别有64.4%和60.0%。Logistic分析结果显示,流动老人的居民健康档案行为受到月消费水平(B = 0.368,P<0.05)、社区文体活动参与程度(B = 0.362,P<0.01)、居留意愿(B = 0.408,P<0.001)、年龄(B = - 0. 513,P<0.01)、户籍类型(B = 0.742,P<0.01)、流动类型(B = - 0.539,P<0.05)等变量的影响;健康教育服务利用行为受到社区文体活动参与程度(B = 0.354,P<0.01)、年龄(B = - 0.411,P<0.05)、户籍类型(B = 0.561,P<0.05)的影响;老年人健康管理服务利用行为受到社区文体活动参与程度(B = 0.291,P<0.01)、居留意愿(B = 0.239,P<0.05)、年龄(B = - 0.474,P<0.05)、流动类型(B = - 0.471,P<0.05)、流动时间(B = 0.225,P<0.05)、流动目的(B = 0.328,P<0.01)的影响。结论 流动老人基本公共卫生服务利用率较低,社会融合会对流动老人的基本公共卫生服务利用产生积极影响。可以通过提高流动老人获得基本公共卫生服务的能力和社会融合水平来促进流动老人的基本公共卫生服务利用,从而实现基本公共服务均等化。  相似文献   
7.
Introduction and objectivesLiver cirrhosis is a major public health issue associated with high morbidity and mortality. The ANSWER trial showed that long-term human albumin (LTA) infusions led to significant reduction of complications and mortality in patients with uncomplicated ascites. The present study aimed to assess the incremental cost of cirrhosis patients treated with LTA plus standard medical treatment (SMT) versus those treated with SMT from the perspective of the Mexican Social Security Institute (IMSS).Material and methodsCost of illness for patients with cirrhosis and grade 2-3 ascites treated with SMT or with SMT and LTA (following the treatment regimen from ANSWER) over a one-year period was estimated according to the IMSS perspective. Rates of treatments, complications and hospitalizations were based on results from the ANSWER trial. Unit costs from IMSS were gathered from public sources and transformed to 2020 Mexican $ (Mex$).ResultsThe use of LTA is estimated to require additional annual expenditure derived from the pharmacological cost of human albumin and by the follow up visits required for LTA administration (Mex$28,128). However, this cost may potentially be counterbalanced by the reduction in paracentesis, cirrhosis-related complications and hospitalizations which would lead to cost savings of Mex$33,417 per patient/year.ConclusionsBased on the ANSWER trial results, our study suggests that LTA may result in improved clinical outcomes and reduced costs for the IMSS when administered to cirrhosis patients with uncomplicated ascites.  相似文献   
8.
PurposeAccording to the social determinants of health framework, income inequality is a potential risk factor for adverse mental health. However, few studies have explored the mechanisms suspected to mediate this relationship. The current study addresses this gap through a mediation analysis to determine if social support and community engagement act as mediators linking neighbourhood income inequality to maternal anxiety and depressive symptoms within a cohort of new mothers living in the City of Calgary, Canada.MethodsData collected at three years postpartum from mothers belonging to the All Our Families (AOF) cohort were used in the current study. Maternal data were collected between 2012 and 2015 and linked to neighbourhood socioeconomic data from the 2006 Canadian Census. Income inequality was measured using Gini coefficients derived from 2006 after-tax census data. Generalized structural equation models were used to quantify the associations between income inequality and mental health symptoms, and to assess the potential direct and indirect mediating effects of maternal social support and community engagement.ResultsIncome inequality was not significantly associated with higher depressive symptoms (β = 0.32, 95%CI = −0.067, 0.70), anxiety symptoms (β = 0.11, 95%CI = −0.39, 0.60), or lower social support. Income inequality was not associated with community engagement. For the depression models, higher social support was significantly associated with lower depressive symptoms (β = −0.13, 95%CI = −0.15, −0.097), while community engagement was not significantly associated with depressive symptoms (β = 0.059, 95%CI = −0.15, 0.27). Similarly, for the anxiety models, lower anxiety symptoms were significantly associated with higher levels of social support (β = −0.17, 95%CI = −0.20, −0.13) but not with higher levels of community engagement (β = 0.14, 95%CI = −0.14, 0.41).ConclusionThe current study did not find clear evidence for social support or community engagement mediating the relationship between neighbourhood income inequality and maternal mental health. Future investigations should employ a broader longitudinal approach to capture changes in income inequality, potential mediators, and mental health symptomatology over time.  相似文献   
9.
  目的  了解上海市社区居民在COVID-19疫情期间其社会支持、焦虑及睡眠质量的情况,并分析三者之间的关系。  方法  采用问卷对居民的社会支持、焦虑以及睡眠质量情况进行调查,问卷选自社会支持评定量表、焦虑自评量表及匹茨堡睡眠质量指数量表,调查上海市社区居民在COVID-19疫情下社会支持、焦虑、睡眠质量情况并对其可能的影响因素进行分析,最后拟合结构方程模型,探索三者的关系。  结果  共回收问卷258份,其中有效问卷237份。结果显示在不同最高学历的居民之间,其睡眠质量(P=0.004)及社会支持(P=0.009)间的差异有统计学意义。结构方程模型拟合指数CFI=0.929,NFI=0.891,IFI=0.930,NNFI=0.907,RMSEA=0.082,χ2 /df=2.599,拟合效果良好,其结果表明居民所受社会支持可在一定程度上影响其焦虑程度(r=-0.15),所受社会支持越高,其焦虑程度越低。而焦虑程度可影响睡眠质量(r=0.72),焦虑程度越高,睡眠质量越差。  结论  COVID-19疫情期间上海市居民的社会支持与其焦虑程度相关,而焦虑程度与睡眠质量相关,可通过提升居民的社会支持,降低其焦虑程度,从而提高其睡眠质量。  相似文献   
10.
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