全文获取类型
收费全文 | 13709篇 |
免费 | 1051篇 |
国内免费 | 69篇 |
专业分类
耳鼻咽喉 | 106篇 |
儿科学 | 414篇 |
妇产科学 | 233篇 |
基础医学 | 2269篇 |
口腔科学 | 305篇 |
临床医学 | 1219篇 |
内科学 | 3171篇 |
皮肤病学 | 373篇 |
神经病学 | 1673篇 |
特种医学 | 278篇 |
外科学 | 1361篇 |
综合类 | 71篇 |
一般理论 | 9篇 |
预防医学 | 1031篇 |
眼科学 | 148篇 |
药学 | 999篇 |
中国医学 | 48篇 |
肿瘤学 | 1121篇 |
出版年
2024年 | 19篇 |
2023年 | 136篇 |
2022年 | 327篇 |
2021年 | 629篇 |
2020年 | 347篇 |
2019年 | 448篇 |
2018年 | 501篇 |
2017年 | 392篇 |
2016年 | 443篇 |
2015年 | 469篇 |
2014年 | 580篇 |
2013年 | 711篇 |
2012年 | 1105篇 |
2011年 | 1172篇 |
2010年 | 662篇 |
2009年 | 548篇 |
2008年 | 851篇 |
2007年 | 890篇 |
2006年 | 774篇 |
2005年 | 758篇 |
2004年 | 722篇 |
2003年 | 592篇 |
2002年 | 562篇 |
2001年 | 102篇 |
2000年 | 85篇 |
1999年 | 98篇 |
1998年 | 117篇 |
1997年 | 111篇 |
1996年 | 69篇 |
1995年 | 76篇 |
1994年 | 54篇 |
1993年 | 41篇 |
1992年 | 52篇 |
1991年 | 49篇 |
1990年 | 43篇 |
1989年 | 29篇 |
1988年 | 30篇 |
1987年 | 17篇 |
1986年 | 27篇 |
1985年 | 21篇 |
1984年 | 19篇 |
1983年 | 16篇 |
1982年 | 16篇 |
1981年 | 15篇 |
1980年 | 8篇 |
1979年 | 14篇 |
1978年 | 12篇 |
1977年 | 7篇 |
1974年 | 12篇 |
1972年 | 6篇 |
排序方式: 共有10000条查询结果,搜索用时 347 毫秒
1.
2.
3.
Ariel Paracampo Marina Solis Carlos Bonetto 《International journal of environmental health research》2015,25(1):96-103
Chlorpyrifos is the most used insecticide in Argentina. Cnesterodon decemmaculatus is a widely distributed, endemic fish from Neotropical America. It attains high densities in the shallow water assemblages of Argentina and Brazil. The aim of this study was to assess the acute toxicity of chlorpyrifos to C. decemmaculatus. The mean 96-h LC50 of three independent determinations was 105.3 (±?3.1) μg/L. Sublethal effects were observed. Swimming behavioral changes at each chlorpyrifos exposure concentration were reported. C. decemmaculatus represents a good model for ecotoxicological risk assessment. 相似文献
4.
5.
Hagop Kantarjian Tapan Kadia Courtney DiNardo Naval Daver Gautam Borthakur Elias Jabbour Guillermo Garcia-Manero Marina Konopleva Farhad Ravandi 《Blood cancer journal》2021,11(2)
Progress in the understanding of the biology and therapy of acute myeloid leukemia (AML) is occurring rapidly. Since 2017, nine agents have been approved for various indications in AML. These included several targeted therapies like venetoclax, FLT3 inhibitors, IDH inhibitors, and others. The management of AML is complicated, highlighting the need for expertise in order to deliver optimal therapy and achieve optimal outcomes. The multiple subentities in AML require very different therapies. In this review, we summarize the important pathophysiologies driving AML, review current therapies in standard practice, and address present and future research directions.Subject terms: Prognosis, Health services 相似文献
6.
Camila Padilha Barbosa Rosalie Barreto Belian Cláudia Marina Tavares de Araújo 《Jornal de pediatria》2021,97(1):80-87
ObjectiveTo present, the process of development and evaluation of an educational software on the Child Health Handbook proposed for the continuing education of primary care nurses and physicians.MethodsQuantitative study of methodological development. For software development, the following steps were followed: definition of objectives; determination of the target audience; choice of pedagogical and theoretical reference for content; content selection and structuring; software development and evaluation by experts (five nurses and four physicians). All responded to an instrument that included four domains: pedagogical; content; functionality; system presentation and usability. The evaluation criteria were arranged on a Likert-type scale. The percentage of agreement and Content Validity Index were used for the quantitative analysis of the degree of agreement, considering a Content Validity Index cutoff point equal to 0.80.ResultsThe overall agreement index, calculated by the arithmetic mean of the Contents Validity Index of the evaluated domains, was 0.96, with scores ranging from 0.90 to 1.00. The average percentage of agreement of the experts per domain was 92.86%, with lower agreement in the content (80.95%), presentation, and usability (90.48%) domains. 100% of percentage of agreement was observed in the pedagogical and functionality domains among the evaluated specialists.ConclusionThe percentage of agreement, Content Validity Index and overall agreement index of the Child Health Handbook educational software in the context of primary care disclosed the software adequacy as an educational resource for continuing education of primary care nurses and physicians. Considering the assessed dimensions, it can also be used by other health professionals and undergraduate students. 相似文献
7.
8.
9.
Stephanie A. Grilo Marina Catallozzi John S. Santelli Hanying Yan Xiaoyu Song Jennifer Heitel Kristen Kaseeska Julie Gorzkowski Alexandra E. Dereix Jonathan D. Klein 《The Journal of adolescent health》2019,64(3):311-318
Purpose
The objective of the study was to define factors associated with adolescent and young adult (AYA) experiences with private time and having discussed confidentiality and the impact of these experiences on improving delivery of clinical preventive services.Methods
In 2016, a nationally representative sample of 1,918 US AYAs (13- to 26-year-olds) was surveyed. Survey questionnaire domains were based on prior research and Fishers' information-motivation-behavior skills conceptual model. Data were weighted to represent US households with AYA and analyzed to identify factors independently associated with ever experiencing private time and discussions of confidentiality with a regular health-care provider (HCP). We examined the association of these experiences on AYA attitudes about health care.Results
Fifty-five percent of female and 49% of male AYA reported ever having had private time with an HCP and 55% of female and 44% of male AYA had spoken to an HCP about confidentiality. Independent predictors of having experienced private time and confidentiality included older age, race, higher household income, gender of the provider, amount of years with the provider, and involvement in risk behaviors. AYA who had experienced private time and confidentiality discussions had more positive attitudes about their providers, were more willing and comfortable discussing sensitive topics, and thought that these discussions should happen at younger ages.Conclusions
Although confidentiality and private time are important to AYA, many are not experiencing these components of care. Providing private time and discussions of confidentiality can improve the delivery of health care for young people by enhancing positive youth attitudes about preventive care. 相似文献10.