全文获取类型
收费全文 | 24857篇 |
免费 | 1687篇 |
国内免费 | 195篇 |
专业分类
耳鼻咽喉 | 67篇 |
儿科学 | 632篇 |
妇产科学 | 509篇 |
基础医学 | 2608篇 |
口腔科学 | 212篇 |
临床医学 | 4681篇 |
内科学 | 2148篇 |
皮肤病学 | 106篇 |
神经病学 | 3364篇 |
特种医学 | 348篇 |
外科学 | 1830篇 |
综合类 | 2292篇 |
一般理论 | 4篇 |
预防医学 | 5468篇 |
眼科学 | 44篇 |
药学 | 1487篇 |
14篇 | |
中国医学 | 241篇 |
肿瘤学 | 684篇 |
出版年
2023年 | 550篇 |
2022年 | 750篇 |
2021年 | 1136篇 |
2020年 | 1233篇 |
2019年 | 1218篇 |
2018年 | 1087篇 |
2017年 | 1098篇 |
2016年 | 1041篇 |
2015年 | 986篇 |
2014年 | 1848篇 |
2013年 | 2404篇 |
2012年 | 1515篇 |
2011年 | 1660篇 |
2010年 | 1278篇 |
2009年 | 1275篇 |
2008年 | 1289篇 |
2007年 | 1177篇 |
2006年 | 903篇 |
2005年 | 665篇 |
2004年 | 555篇 |
2003年 | 446篇 |
2002年 | 354篇 |
2001年 | 288篇 |
2000年 | 253篇 |
1999年 | 220篇 |
1998年 | 148篇 |
1997年 | 159篇 |
1996年 | 106篇 |
1995年 | 122篇 |
1994年 | 106篇 |
1993年 | 88篇 |
1992年 | 68篇 |
1991年 | 61篇 |
1990年 | 41篇 |
1989年 | 42篇 |
1988年 | 43篇 |
1987年 | 29篇 |
1986年 | 34篇 |
1985年 | 60篇 |
1984年 | 58篇 |
1983年 | 35篇 |
1982年 | 36篇 |
1981年 | 37篇 |
1980年 | 39篇 |
1979年 | 42篇 |
1978年 | 28篇 |
1977年 | 20篇 |
1976年 | 21篇 |
1975年 | 19篇 |
1974年 | 24篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
《The Journal of thoracic and cardiovascular surgery》2023,165(1):301-326
ObjectiveThe use of mechanical circulatory support (MCS) in lung transplantation has been steadily increasing over the prior decade, with evolving strategies for incorporating support in the preoperative, intraoperative, and postoperative settings. There is significant practice variability in the use of these techniques, however, and relatively limited data to help establish institutional protocols. The objective of the AATS Clinical Practice Standards Committee (CPSC) expert panel was to review the existing literature and establish recommendations about the use of MCS before, during, and after lung transplantation.MethodsThe AATS CPSC assembled an expert panel of 16 lung transplantation physicians who developed a consensus document of recommendations. The panel was broken into subgroups focused on preoperative, intraoperative, and postoperative support, and each subgroup performed a focused literature review. These subgroups formulated recommendation statements for each subtopic, which were evaluated by the entire group. The statements were then developed via discussion among the panel and refined until consensus was achieved on each statement.ResultsThe expert panel achieved consensus on 36 recommendations for how and when to use MCS in lung transplantation. These recommendations included the use of veno-venous extracorporeal membrane oxygenation (ECMO) as a bridging strategy in the preoperative setting, a preference for central veno-arterial ECMO over traditional cardiopulmonary bypass during the transplantation procedure, and the benefit of supporting selected patients with MCS postoperatively.ConclusionsAchieving optimal results in lung transplantation requires the use of a wide range of strategies. MCS provides an important mechanism for helping these critically ill patients through the peritransplantation period. Despite the complex nature of the decision making process in the treatment of these patients, the expert panel was able to achieve consensus on 36 recommendations. These recommendations should provide guidance for professionals involved in the care of end-stage lung disease patients considered for transplantation. 相似文献
2.
《Research in social & administrative pharmacy》2022,18(9):3694-3698
In this paper, we argue that understanding and addressing the problem of poor-quality medical products requires a more interdisciplinary approach than has been evident to date. While prospective studies based on rigorous standardized methodologies are the gold standard for measuring the prevalence of poor-quality medical products and understanding their distribution nationally and internationally, they should be complemented by social science research to unpack the complex set of social, economic, and governance factors that underlie these patterns. In the following sections, we discuss specific examples of prospective quality surveys and of social science studies, highlighting the value of cross-sector partnerships in driving high-quality, policy-relevant research in this area. 相似文献
3.
目的:了解中国居民对执业药师立法的支持度及其影响因素。方法:通过问卷对抽取的120个城市的居民进行横断面研究,采用多重线性回归分析居民对执业药师立法意愿得分的相关因素。结果:中国居民对于执业药师立法支持度平均得分为69.04分。本科及以上学历(β=0.04)、轻度焦虑(β=0.03)、重度压力(β=0.05)居民对执业药师立法支持度较高,P均<0.01;中重度抑郁(β=-0.02,P<0.01)居民对执业药师立法支持度较低。家庭健康状况(β=0.30)、自我健康感觉(β=0.25)、自我管理能力(β=0.13)、健康素养(β=0.12)和领悟社会支持(β=0.09)均对居民执业药师立法支持度得分产生显著的正向影响(P<0.01)。结论:文化程度、焦虑、压力、抑郁、家庭健康状况、自我健康感觉、自我管理能力、健康素养和社会支持均是影响居民对执业药师立法态度的主要因素。 相似文献
4.
5.
刘卫超 《世界睡眠医学杂志》2022,(1)
目的:观察压力支持通气模式(Pressure Support Ventilation,PSV)对重症监护患者睡眠质量的影响。方法:选取2017年1月至2017年8月德州市陵城区人民医院重症监护病房(ICU)收治的重症治疗患者60例作为研究对象,按照随机数字表法分为观察组和对照组,每组30例。对照组患者给予低剂量镇静加气管插管的方式进行干预,观察组患者给予压力支持通气模式进行干预,采用匹兹堡睡眠指数量表(Pittsburgh Sleep Quality Index,PSQI)比较2组患者干预前后的睡眠质量改善情况,采用抑郁自评量表(Self-rating Depression Scale,SDS)、焦虑自评量表(Self-rating Anxiety Scale,SAS)比较2组患者干预前后的焦虑以及抑郁状态改善情况。结果:干预后,观察组PSQI评分显著低于对照组,观察组SAS评分、SDS评分显著低于对照组,2组比较差异均有统计学意义(P<0.05)。结论:对重症监护患者采用压力支持通气模式有利于改善患者的睡眠质量。 相似文献
6.
目的:探讨营养支持小组在肝硬化病人营养管理中的应用效果。方法:选取2020年4月6日—2020年12月31日医院收治的161例乙型肝炎肝硬化病人为研究对象,采用随机数字表法将其分为观察组80例和对照组81例。观察组实施营养支持小组主导的营养管理,对照组实施常规营养管理。住院期和随访期总共12周,比较两组病人干预前后的营养学指标、肝功能恢复情况、并发症发生情况等。结果:最终完成研究病人146例(观察组75例,对照组71例),中途退出15例。观察组病人干预后营养学指标血红蛋白(Hb)、血清白蛋白(ALB)、血清前白蛋白(PA)均明显高于对照组(P<0.05),观察组病人干预后肝功能指标丙氨酸氨基转移酶(ALT)、天门冬氨酸氨基转移酶(AST)和总胆红素(TBIL)明显低于对照组(P<0.05),随访期间并发症的发生率明显低于对照组(P<0.05)。结论:对肝硬化病人进行营养风险筛查和营养支持小组管理有利于改善肝硬化病人的营养状况和肝功能,降低并发症发生率。 相似文献
7.
《Journal of the Academy of Nutrition and Dietetics》2022,122(12):2288-2294
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
8.
《Health & place》2022
IntroductionWe extend previous research to illustrate how individual, interpersonal and neighbourhood factors in a high-density urban setting in Vancouver, Canada, shape social connectedness experiences of community-dwelling older adults during the first wave of the COVID-19 pandemic.MethodsWe conducted 31 semi-structured interviews and collected objective measures of loneliness and social connectedness (surveys).ResultsThree dimensions of the neighbourhood environment influenced social connectedness: (i) interactions with neighbours, (ii) involvement with neighbourhood-based organizations, and (ii) outdoor pedestrian spaces. Seventy-one percent of participants felt a strong sense of belonging to their local community, while 39% were classified as high or extremely lonely.SummaryMany participants leveraged pre-existing social ties to maintain connections during the pandemic. However, volunteer outreach was vital for more isolated older adults. Although many participants felt lonely and isolated at times, the relative ease and accessibility with which they could connect with others in their neighbourhood environment, may have helped mitigate persistent loneliness.ConclusionStrategies that foster social connectedness over the longer term, need to prioritize the needs of older adults who face multiple barriers to equitable social participation. 相似文献
9.
《Journal of emergency nursing》2022,48(6):652-665
This is a revision of the previous American Academy of Pediatrics policy statement titled “Patient Safety in the Emergency Care Setting” and is the first joint policy statement by the American Academy of Pediatrics, the American College of Emergency Physicians, and the Emergency Nurses Association to address pediatric patient safety in the emergency care setting. Caring for children in the emergency setting can be prone to medical errors because of a number of environmental and human factors. The emergency department has frequent workflow interruptions, multiple care transitions, and barriers to effective communication. In addition, the high volume of patients, high decision density under time pressure, diagnostic uncertainty, and limited knowledge of patients’ history and preexisting conditions make the safe care of critically ill and injured patients even more challenging. It is critical that all emergency departments, including general emergency departments who care for the majority of ill and injured children, understand the unique safety issues related to children. Furthermore, it is imperative that all emergency departments practice patient safety principles, support a culture of safety, and adopt best practices to improve safety for all children seeking emergency care. This policy statement outlines the recommendations necessary for emergency departments to minimize pediatric medical errors and to provide safe care for children of all ages. 相似文献
10.
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