全文获取类型
收费全文 | 18398篇 |
免费 | 1481篇 |
国内免费 | 86篇 |
专业分类
耳鼻咽喉 | 230篇 |
儿科学 | 522篇 |
妇产科学 | 422篇 |
基础医学 | 2708篇 |
口腔科学 | 723篇 |
临床医学 | 1550篇 |
内科学 | 4076篇 |
皮肤病学 | 445篇 |
神经病学 | 2134篇 |
特种医学 | 456篇 |
外国民族医学 | 1篇 |
外科学 | 2519篇 |
综合类 | 76篇 |
一般理论 | 3篇 |
预防医学 | 1354篇 |
眼科学 | 239篇 |
药学 | 1171篇 |
中国医学 | 57篇 |
肿瘤学 | 1279篇 |
出版年
2023年 | 139篇 |
2022年 | 145篇 |
2021年 | 600篇 |
2020年 | 377篇 |
2019年 | 611篇 |
2018年 | 741篇 |
2017年 | 476篇 |
2016年 | 494篇 |
2015年 | 572篇 |
2014年 | 750篇 |
2013年 | 887篇 |
2012年 | 1394篇 |
2011年 | 1441篇 |
2010年 | 814篇 |
2009年 | 661篇 |
2008年 | 1024篇 |
2007年 | 973篇 |
2006年 | 956篇 |
2005年 | 845篇 |
2004年 | 787篇 |
2003年 | 671篇 |
2002年 | 637篇 |
2001年 | 366篇 |
2000年 | 350篇 |
1999年 | 325篇 |
1998年 | 119篇 |
1997年 | 109篇 |
1996年 | 102篇 |
1995年 | 131篇 |
1994年 | 91篇 |
1993年 | 66篇 |
1992年 | 244篇 |
1991年 | 207篇 |
1990年 | 190篇 |
1989年 | 194篇 |
1988年 | 176篇 |
1987年 | 141篇 |
1986年 | 130篇 |
1985年 | 115篇 |
1984年 | 118篇 |
1983年 | 82篇 |
1982年 | 50篇 |
1980年 | 40篇 |
1979年 | 76篇 |
1978年 | 48篇 |
1977年 | 37篇 |
1975年 | 36篇 |
1974年 | 54篇 |
1973年 | 40篇 |
1971年 | 37篇 |
排序方式: 共有10000条查询结果,搜索用时 688 毫秒
1.
Francisco Javier P rez Lara Maria Belen Jimenez Martinez Francisco Pozo Mu oz res Fontalba Navas Rogelio Garcia Cisneros Maria Jose Garcia Larrosa Ignacio Garcia Delgado Maria del Mar Callejon Gil 《World Journal of Clinical Cases》2021,9(23):6582-6590
The coronavirus disease 2019, which is caused by severe acute respiratory syndrome coronavirus 2, was first identified in December 2019 in Wuhan, China, and has since spread rapidly, evolving into a full-blown pandemic. We would like to report our experience after 1 year of this pandemic in the surgical service of a district hospital in Spain. There have been many changes (including new protocols) that our service and the hospital have undergone, to adapt to the new situation. We believe that this experience can be useful for other professionals who have lived and are living a similar situation. 相似文献
2.
3.
Del Lama Rafael Silva Candido Raquel Mariana Chiari-Correia Natália Santana Nogueira-Barbosa Marcello Henrique de Azevedo-Marques Paulo Mazzoncini Tinós Renato 《Journal of digital imaging》2022,35(3):446-458
Journal of Digital Imaging - Vertebral Compression Fracture (VCF) occurs when the vertebral body partially collapses under the action of compressive forces. Non-traumatic VCFs can be secondary to... 相似文献
4.
Cheryl L. Rock PhD RD Cynthia A. Thomson PhD RD Kristen R. Sullivan MS MPH Carol L. Howe MD MLS Lawrence H. Kushi ScD Bette J. Caan DrPH Marian L. Neuhouser PhD RD Elisa V. Bandera MD PhD Ying Wang PhD Kimberly Robien PhD RD Karen M. Basen-Engquist PhD MPH Justin C. Brown PhD Kerry S. Courneya PhD Tracy E. Crane PhD RDN David O. Garcia PhD FACSM Barbara L. Grant MS RDN CSO FAND Kathryn K. Hamilton MA RDN CSO CDN FAND Sheri J. Hartman PhD Stacey A. Kenfield ScD Maria Elena Martinez PhD Jeffrey A. Meyerhardt MD MPH Larissa Nekhlyudov MD MPH Linda Overholser MD Alpa V. Patel PhD Bernardine M. Pinto PhD Mary E. Platek PhD RD CDN Erika Rees-Punia PhD MPH Colleen K. Spees PhD MEd RD LD FAND Susan M. Gapstur PhD Marjorie L. McCullough ScD RD 《CA: a cancer journal for clinicians》2022,72(3):230-262
The overall 5-year relative survival rate for all cancers combined is now 68%, and there are over 16.9 million survivors in the United States. Evidence from laboratory and observational studies suggests that factors such as diet, physical activity, and obesity may affect risk for recurrence and overall survival after a cancer diagnosis. The purpose of this American Cancer Society guideline is to provide evidence-based, cancer-specific recommendations for anthropometric parameters, physical activity, diet, and alcohol intake for reducing recurrence and cancer-specific and overall mortality. The audiences for this guideline are health care providers caring for cancer survivors as well as cancer survivors and their families. The guideline is intended to serve as a resource for informing American Cancer Society programs, health policy, and the media. Sources of evidence that form the basis of this guideline are systematic literature reviews, meta-analyses, pooled analyses of cohort studies, and large randomized clinical trials published since 2012. Recommendations for nutrition and physical activity during cancer treatment, informed by current practice, large cancer care organizations, and reviews of other expert bodies, are also presented. To provide additional context for the guidelines, the authors also include information on the relationship between health-related behaviors and comorbidities, long-term sequelae and patient-reported outcomes, and health disparities, with attention to enabling survivors' ability to adhere to recommendations. Approaches to meet survivors' needs are addressed as well as clinical care coordination and resources for nutrition and physical activity counseling after a cancer diagnosis. 相似文献
5.
Caio Henrique de Carvalho Assuno Júlio Csar Trabanco Raquel Fornaziero Gomes Renata Rodrigues Moreira Alessandra Giannella Samelli 《La Medicina del lavoro》2019,110(4):304
Objective:The present study evaluates a training program for fitting different hearing protection devices (HPDs) based on personal attenuation rating (PAR) before, immediately after, and six months after training.Methods:A total of 67 workers from a public university in the city of São Paulo, Brazil, were invited to participate in the measurement of PARs for foam and silicone protectors through the 3M™ E-A-Rfit Validation System. Two evaluations were performed for each protector at each sampling date: one after reading printed material (the package instructions) and another after being trained by an audiologist. The same procedures were repeated after six months. The final sample consisted of 30 individuals. ANOVA was used for statistical analysis.Results:Larger PAR values were observed after training by the audiologist, and smaller values were observed after six months. Then, after re-training, the values increased again. There were no statistically significant differences in PAR among the HPDs tested. Even after the two training sessions, 23 to 27% of the subjects did not obtain adequate PAR values.Conclusion:These findings emphasize the need for continual worker training in the correct fit of earplug HPDs and the importance of longitudinal PAR monitoring. In addition, some workers, despite the training provided, did not adapt to the HPDs used. Therefore, it is essential that other protection methods and/or other HPD types are made available to these individuals.Key words: Hearing, noise-induced hearing loss, occupational health, personal protective equipment, hearing protection devices 相似文献
6.
Luis Veloza Cristina Teixido Natalia Castrejon Fina Climent Ana Carri Marta Marginet Davide Soldini Blanca Gonzlez‐Farr Inmaculada Ribera‐Cortada Armando Lopez‐Guillermo Eva Gonzlez‐Barca Adriana Sierra Mileyka Herrera Cndida Gmez Adriana Garcia Olga Balagu Elias Campo Antonio Martinez 《Histopathology》2019,75(6):799-812
7.
8.
9.
10.
Alazne Belar Maria Arantzamendi Alfredo Rodríguez-Núñez Yolanda Santesteban Marina Martinez Mario López-Saca Sara Consigli Jesús López-Fidalgo Carlos Centeno 《Journal of pain and symptom management》2019,57(3):627-634