全文获取类型
收费全文 | 39211篇 |
免费 | 2273篇 |
国内免费 | 107篇 |
专业分类
耳鼻咽喉 | 479篇 |
儿科学 | 1475篇 |
妇产科学 | 692篇 |
基础医学 | 5264篇 |
口腔科学 | 822篇 |
临床医学 | 2822篇 |
内科学 | 9871篇 |
皮肤病学 | 1176篇 |
神经病学 | 3879篇 |
特种医学 | 1027篇 |
外科学 | 5210篇 |
综合类 | 170篇 |
一般理论 | 11篇 |
预防医学 | 3310篇 |
眼科学 | 600篇 |
药学 | 2338篇 |
中国医学 | 140篇 |
肿瘤学 | 2305篇 |
出版年
2023年 | 263篇 |
2022年 | 381篇 |
2021年 | 1159篇 |
2020年 | 559篇 |
2019年 | 1047篇 |
2018年 | 1527篇 |
2017年 | 943篇 |
2016年 | 943篇 |
2015年 | 989篇 |
2014年 | 1149篇 |
2013年 | 1674篇 |
2012年 | 2792篇 |
2011年 | 3018篇 |
2010年 | 1634篇 |
2009年 | 1269篇 |
2008年 | 2404篇 |
2007年 | 2526篇 |
2006年 | 2361篇 |
2005年 | 2337篇 |
2004年 | 2210篇 |
2003年 | 1917篇 |
2002年 | 1885篇 |
2001年 | 1100篇 |
2000年 | 1311篇 |
1999年 | 963篇 |
1998年 | 246篇 |
1997年 | 176篇 |
1996年 | 157篇 |
1995年 | 121篇 |
1994年 | 95篇 |
1993年 | 80篇 |
1992年 | 353篇 |
1991年 | 267篇 |
1990年 | 277篇 |
1989年 | 184篇 |
1988年 | 143篇 |
1987年 | 129篇 |
1986年 | 139篇 |
1985年 | 114篇 |
1984年 | 81篇 |
1983年 | 63篇 |
1982年 | 35篇 |
1979年 | 38篇 |
1975年 | 30篇 |
1974年 | 54篇 |
1973年 | 56篇 |
1972年 | 41篇 |
1971年 | 40篇 |
1970年 | 40篇 |
1969年 | 38篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
21.
José M. Martín M.D. Ph.D. Gerardo Beteta M.D. Andrea Allende M.D. Esperanza Jordá M.D. Ph.D. 《Pediatric dermatology》2015,32(6):e303-e304
We report on a 3‐year‐old girl with a microvesicular generalized rash in whom primary infection by parvovirus B19 was demonstrated by seroconversion. To our knowledge, this is the first instance of an eruption arising from parvovirus B19 with this peculiar clinical pattern. 相似文献
22.
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
23.
24.
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25.
26.
27.
Rosario Fernández-Plata Rogelio Pérez-Padilla Rodrigo Del Río-Hidalgo Cecilia García-Sancho Laura Gochicoa-Rangel Christian Rodríguez-Hernández Luis Torre-Bouscoulet David Martínez-Briseño 《Archivos de bronconeumología》2019,55(10):513-518
IntroductionPeople with Down syndrome (DS) have high respiratory morbidity, evaluating their respiratory health with standardized, objective tests is desirable. Thus, the objective of this study was to evaluate the technical quality of Pulmonary Function Tests (PFTs) to determine which ones are most suitable for this population.MethodsParticipants included children, teenagers and adults with DS, 5 years of age or older (n = 302). The technical quality of the impulse oscillometry system (IOS), forced spirometry, lung-diffusing capacity for carbon monoxide (DLCO), and 6-min walk test (6MWT) were analyzed by age group. Capnography and pulse oximetry were included in the study. Technical quality was determined on the basis of current international PFTs standards.ResultsFifty-one percent of participants were males. A total of 184 participants (71%) who completed the IOS fulfilled the quality criteria, while 210 (70%) completed the 6MWT. Performance on forced spirometry and DLCO was poor. All pulse oximetries and 96% percent heart rates obtained had good quality, but exhaled carbon dioxide (PetCO2) and respiratory rate (RR) showed deficient repeatability.ConclusionsIOS appears to be the most reliable instrument for evaluating lung mechanics in individuals with DS. 相似文献
28.
29.
30.
J. Rodríguez-Carrio A. Martínez-Zapico I. Cabezas-Rodríguez L. Benavente Á.I. Pérez-Álvarez P. López J.B. Cannata-Andía M. Naves-Díaz A. Suárez 《Nutrition, metabolism, and cardiovascular diseases : NMCD》2019,29(2):135-143