全文获取类型
收费全文 | 175597篇 |
免费 | 6959篇 |
国内免费 | 399篇 |
专业分类
耳鼻咽喉 | 2280篇 |
儿科学 | 5134篇 |
妇产科学 | 4147篇 |
基础医学 | 25193篇 |
口腔科学 | 5549篇 |
临床医学 | 10639篇 |
内科学 | 38341篇 |
皮肤病学 | 4709篇 |
神经病学 | 14492篇 |
特种医学 | 4386篇 |
外国民族医学 | 1篇 |
外科学 | 20032篇 |
综合类 | 864篇 |
一般理论 | 25篇 |
预防医学 | 20798篇 |
眼科学 | 4675篇 |
药学 | 13451篇 |
中国医学 | 682篇 |
肿瘤学 | 7557篇 |
出版年
2023年 | 924篇 |
2022年 | 743篇 |
2021年 | 2846篇 |
2020年 | 1628篇 |
2019年 | 3168篇 |
2018年 | 5284篇 |
2017年 | 3367篇 |
2016年 | 3404篇 |
2015年 | 3752篇 |
2014年 | 4182篇 |
2013年 | 6378篇 |
2012年 | 10954篇 |
2011年 | 11518篇 |
2010年 | 5719篇 |
2009年 | 4185篇 |
2008年 | 9406篇 |
2007年 | 10076篇 |
2006年 | 9606篇 |
2005年 | 9121篇 |
2004年 | 8527篇 |
2003年 | 7962篇 |
2002年 | 7583篇 |
2001年 | 4952篇 |
2000年 | 5538篇 |
1999年 | 4230篇 |
1998年 | 797篇 |
1992年 | 2277篇 |
1991年 | 2052篇 |
1990年 | 2010篇 |
1989年 | 1731篇 |
1988年 | 1640篇 |
1987年 | 1562篇 |
1986年 | 1581篇 |
1985年 | 1518篇 |
1984年 | 1091篇 |
1983年 | 936篇 |
1979年 | 1259篇 |
1978年 | 857篇 |
1977年 | 803篇 |
1976年 | 772篇 |
1975年 | 907篇 |
1974年 | 1162篇 |
1973年 | 1188篇 |
1972年 | 1135篇 |
1971年 | 1108篇 |
1970年 | 1042篇 |
1969年 | 1116篇 |
1968年 | 1131篇 |
1967年 | 1007篇 |
1966年 | 912篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
13.
Sania Amr Magdy Garas Dina N. K. Boulos Doa’a A. Saleh Irene A. Jillson Christopher A. Loffredo 《Journal of substance use》2019,24(3):341-345
Background: Egyptian street youth use substances including tobacco, illicit drugs, and pharmaceutical drugs. To understand the circumstances, including adverse childhood experiences, that place adolescents at risk for engaging in substance use, we conducted in-depth interviews among a sample of Egyptian street children. Methods: From youth residing at or attending Caritas, a non-profit organization, which provides shelter and education to street youth, seven girls and twelve boys, aged 12–18 years, participated in open-ended, in-depth interviews. Results: Eight out of the 19 participants reported family history (early exposure) to substance use; and seven of them were initiated by either a family member (sibling), friend or coworker. Most of the participants reported a history of conflict with or abuse (verbal or physical) by their parents or siblings, or stressful situations at home; they used substance(s) to alleviate their stress. Few attended school, and some were forced to work and help their family. Conclusions: Among Egyptian youth, adverse childhood experiences, such as poverty, child abuse, and family substance use, challenge somewhat susceptible youths and lead them to the path of substance use and addiction. Prevention intervention should be multifaceted, culturally adaptable, and primarily targeting the social environment during childhood. 相似文献
14.
15.
16.
Ángela M. Ortega-Galán M. Dolores Ruiz-Fernández Rocío Ortiz-Amo José Cabrera-Troya Inés M. Carmona-Rega Olivia Ibáñez-Masero 《Enfermería clínica》2019,29(1):10-17
Objective
To discover the experiences of end-of-life patients attended by the emergency services, through the discourse of the family caregivers who accompanied the family member in this care transit.Method
A qualitative approach study, based on the paradigm of hermeneutical phenomenology. In total, 81 family caregivers participated. The techniques used were the in-depth interview and the discussion group, with a total of 5 discussion groups and 41 interviews. The period of data collection was carried out between January 2013 and June 2014.Results
In the network of discourses obtained with respect to “Urgent Care”, all the codes were grouped in relation to a single argumentative line: deficiencies in urgent care. Among them, we found different dimensions that are established depending on the different times of care, or the different determinant aspects of these deficiencies: disorganization of the care received, lack of experience of the professionals in emergencies, application of general protocols in the emergency services, inadequate care in the treatment received, delays in emergency care.Conclusions
In general, we highlight the dissatisfaction of the family members with respect to the care received from the emergency services. The needs of these types of situation are not covered from these services and are of low quality. Therefore, it is necessary to reorient the care protocols for these patients. 相似文献17.
José A. Lorente Pablo Cardinal-Fernández Diego Muñoz Fernando Frutos-Vivar Arnaud W. Thille Carlos Jaramillo Aida Ballén-Barragán José M. Rodríguez Oscar Peñuelas Guillermo Ortiz José Blanco Bruno Valle Pinheiro Nicolás Nin María del Carmen Marin Andrés Esteban Taylor B. Thompson 《Intensive care medicine》2015,41(11):1921-1930
18.
The association between family affluence and smoking among 15‐year‐old adolescents in 33 European countries,Israel and Canada: the role of national wealth 下载免费PDF全文
19.
Kit Galvin Jen Krenz Marcy Harrington Pablo Palmández Richard A. Fenske 《Journal of agromedicine》2016,21(1):113-122
Development of the Practical Solutions for Pesticide Safety guide used participatory research strategies to identify and evaluate solutions that reduce pesticide exposures for workers and their families and to disseminate these solutions. Project principles were (1) workplace chemicals belong in the workplace, and (2) pesticide handlers and farm managers are experts, with direct knowledge of production practices. The project’s participatory methods were grounded in self-determination theory. Practical solutions were identified and evaluated based on five criteria: practicality, adaptability, health and safety, novelty, and regulatory compliance. Research activities that had more personal contact provided better outcomes. The Expert Working Group, composed of farm managers and pesticide handlers, was key to the identification of solutions, as were farm site visits. Audience participation, hands-on testing, and orchard field trials were particularly effective in the evaluation of potential solutions. Small work groups in a Regional Advisory Committee provided the best direction and guidance for a “user-friendly” translational document that provided evidence-based practical solutions. The “farmer to farmer” format of the guide was endorsed by both the Expert Working Group and the Regional Advisory Committee. Managers and pesticide handlers wanted to share their solutions in order to “help others stay safe,” and they appreciated attribution in the guide. The guide is now being used in educational programs across the region. The fundamental concept that farmers and farmworkers are innovators and experts in agricultural production was affirmed by this study. The success of this process demonstrates the value of participatory industrial hygiene in agriculture. 相似文献
20.
Miguel A. Sanz Pau Montesinos Haesook T. Kim Guillermo J. Ruiz-Argüelles María S. Undurraga María R. Uriarte Lem Martínez Rafael H. Jacomo Homero Gutiérrez-Aguirre Raul A. M. Melo Rosane Bittencourt Ricardo Pasquini Katia Pagnano Evandro M. Fagundes Edo Vellenga Alexandra Holowiecka Ana J. González-Huerta Pascual Fernández Javier De la Serna Salut Brunet Elena De Lisa José González-Campos José M. Ribera Isabel Krsnik Arnold Ganser Nancy Berliner Raul C. Ribeiro Francesco Lo-Coco Bob L?wenberg Eduardo M. Rego 《Annals of hematology》2015,94(8):1347-1356