全文获取类型
收费全文 | 18976篇 |
免费 | 1784篇 |
国内免费 | 254篇 |
专业分类
耳鼻咽喉 | 50篇 |
儿科学 | 572篇 |
妇产科学 | 438篇 |
基础医学 | 1762篇 |
口腔科学 | 165篇 |
临床医学 | 4300篇 |
内科学 | 1941篇 |
皮肤病学 | 60篇 |
神经病学 | 1204篇 |
特种医学 | 291篇 |
外科学 | 1871篇 |
综合类 | 1951篇 |
一般理论 | 2篇 |
预防医学 | 4432篇 |
眼科学 | 29篇 |
药学 | 878篇 |
13篇 | |
中国医学 | 226篇 |
肿瘤学 | 829篇 |
出版年
2024年 | 72篇 |
2023年 | 465篇 |
2022年 | 733篇 |
2021年 | 1038篇 |
2020年 | 1038篇 |
2019年 | 1006篇 |
2018年 | 944篇 |
2017年 | 951篇 |
2016年 | 893篇 |
2015年 | 844篇 |
2014年 | 1405篇 |
2013年 | 1690篇 |
2012年 | 1189篇 |
2011年 | 1183篇 |
2010年 | 963篇 |
2009年 | 873篇 |
2008年 | 918篇 |
2007年 | 857篇 |
2006年 | 678篇 |
2005年 | 536篇 |
2004年 | 438篇 |
2003年 | 357篇 |
2002年 | 299篇 |
2001年 | 230篇 |
2000年 | 216篇 |
1999年 | 185篇 |
1998年 | 137篇 |
1997年 | 148篇 |
1996年 | 89篇 |
1995年 | 99篇 |
1994年 | 95篇 |
1993年 | 74篇 |
1992年 | 59篇 |
1991年 | 43篇 |
1990年 | 35篇 |
1989年 | 35篇 |
1988年 | 30篇 |
1987年 | 32篇 |
1986年 | 19篇 |
1985年 | 23篇 |
1984年 | 24篇 |
1983年 | 19篇 |
1982年 | 13篇 |
1981年 | 5篇 |
1980年 | 7篇 |
1979年 | 8篇 |
1978年 | 6篇 |
1976年 | 4篇 |
1975年 | 3篇 |
1973年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
The buffering effect of social support on the negative effects of racism exposure on health outcomes has been mixed in prior studies regarding Asian Americans. Based on the stress-coping framework and using structural equation modelling (SEM) methods, we tested a theoretical model portraying simultaneous mediational paths from racism exposure to general physical and mental health through racism-related stress. Bootstrap analysis was used to test the indirect effects present in the model. Additionally, multi-group SEM analysis was conducted to investigate the moderation effect of social support from family and friends on the paths in the model. The sample consisted of 310 Asian American adults who completed an online survey. The results from the two-step SEM analysis and bootstrap analysis supported the theoretical model—racism exposure can simultaneously have a negative indirect effect on Asian Americans' physical and mental health via racism-related stress. Multi-group SEM analysis showed that there were no differences in model path coefficients based on having varying levels of social support from friends or family. 相似文献
92.
93.
94.
95.
Shela Akbar Ali Hirani Megan Pearce Amanda Lanoway 《Canadian journal of public health. Revue canadienne de santé publique》2021,112(4):599
SettingThis knowledge mobilization project was conceptualized to increase awareness among breastfeeding mothers and the general public on safe infant feeding practices during the COVID-19 pandemic by addressing myths and misconceptions associated with breastfeeding practices, guiding breastfeeding mothers to make informed decisions around child feeding practices, and offering meaningful guidance in simple language through a short online animated video.InterventionThis project was undertaken in four phases. During phase 1, an informal discussion was held with the breastfeeding mothers, service providers, and community partner in identifying issues surrounding lactation counselling facilities during the COVID-19 pandemic. During phase 2, recommendations from 23 organizations with regard to breastfeeding during COVID-19 were reviewed and analyzed. During phase 3, using evidence from reliable sources, a 5-minute animated e-resource on breastfeeding during COVID-19 was conceptualized and developed. During phase 4, the e-resource was disseminated to the breastfeeding mothers, general public, post-secondary institutions, and organizations providing services to breastfeeding mothers in Canada.OutcomesThis evidence-based e-resource facilitated addressing misconceptions around breastfeeding during COVID-19 and raising public awareness on safe infant feeding practices during this pandemic. Overall, the video was described as an informative, user-friendly, useful, and easily accessible resource by breastfeeding mothers who were in self-isolation with little access to healthcare services during the pandemic.ImplicationsThis project highlighted the importance of patient engagement and collaboration with the community partner in protecting breastfeeding during the COVID-19 pandemic. It further illustrated how informational e-resources can protect breastfeeding in situations where breastfeeding mothers’ access to healthcare services is compromised. 相似文献
96.
《Gaceta sanitaria / S.E.S.P.A.S》2021,35(2):123-129
ObjectiveTo systematically describe the school nutritional policies of the 17 autonomous communities of Spain.MethodThrough a search of bibliographic databases, web pages and other official information systems, 183 documents of interest were identified. Information was systematically collected with the SNIPE (school nutrition index of programme effectiveness) questionnaire, adapted to Spain, and validated by reference staff of the regional government's health and education ministries.ResultsThe main objective of the policies is to prevent obesity and improve the nutrition of schoolchildren. The 17 autonomous communities cover the school canteen service, 11 cafeteria and vending machines, and 9 the breakfast service. All communities use the Consensus Document on School Food as a reference for the content of the menu and the nutritional quality of the products offered at the school; however, only 4 of them have regulated these aspects. The evaluation of policy objectives ranges from 58.8% of the autonomous communities for food supply to 5.9% for rotation and menu quality.ConclusionAlthough all the autonomous communities have standards for the school menu, the standards for the rest of the food supply vary across them; also, evaluation of objectives is scarce and only 4 communities have approved mandatory regulations. Nutritional standards should be reviewed according to current scientific knowledge and enacted by law, in compliance with the current legislation (Act 17/2011). 相似文献
97.
98.
99.
100.