全文获取类型
收费全文 | 21719篇 |
免费 | 1568篇 |
国内免费 | 82篇 |
专业分类
耳鼻咽喉 | 148篇 |
儿科学 | 680篇 |
妇产科学 | 508篇 |
基础医学 | 3440篇 |
口腔科学 | 432篇 |
临床医学 | 2139篇 |
内科学 | 4357篇 |
皮肤病学 | 475篇 |
神经病学 | 2297篇 |
特种医学 | 534篇 |
外科学 | 2030篇 |
综合类 | 120篇 |
一般理论 | 28篇 |
预防医学 | 2297篇 |
眼科学 | 375篇 |
药学 | 1268篇 |
中国医学 | 39篇 |
肿瘤学 | 2202篇 |
出版年
2023年 | 180篇 |
2022年 | 286篇 |
2021年 | 655篇 |
2020年 | 432篇 |
2019年 | 624篇 |
2018年 | 711篇 |
2017年 | 555篇 |
2016年 | 622篇 |
2015年 | 713篇 |
2014年 | 859篇 |
2013年 | 1212篇 |
2012年 | 1713篇 |
2011年 | 1714篇 |
2010年 | 975篇 |
2009年 | 859篇 |
2008年 | 1518篇 |
2007年 | 1458篇 |
2006年 | 1323篇 |
2005年 | 1272篇 |
2004年 | 1106篇 |
2003年 | 1147篇 |
2002年 | 999篇 |
2001年 | 162篇 |
2000年 | 107篇 |
1999年 | 151篇 |
1998年 | 191篇 |
1997年 | 157篇 |
1996年 | 129篇 |
1995年 | 128篇 |
1994年 | 106篇 |
1993年 | 104篇 |
1992年 | 59篇 |
1991年 | 76篇 |
1990年 | 56篇 |
1989年 | 53篇 |
1988年 | 30篇 |
1987年 | 46篇 |
1986年 | 53篇 |
1985年 | 59篇 |
1984年 | 58篇 |
1983年 | 52篇 |
1982年 | 71篇 |
1981年 | 53篇 |
1980年 | 45篇 |
1979年 | 40篇 |
1978年 | 35篇 |
1976年 | 30篇 |
1975年 | 27篇 |
1974年 | 36篇 |
1973年 | 30篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
Interprofessional collaboration and communication in nursing homes: a qualitative exploration of problems in medical care for nursing home residents – study protocol
下载免费PDF全文
![点击此处可从《Journal of advanced nursing》网站下载免费的PDF全文](/ch/ext_images/free.gif)
3.
4.
5.
Maria Gonzalez-Cao Cristina Carrera Juan Francisco Rodriguez Moreno Pedro Rodríguez-Jiménez Mónica Antoñanzas Basa Rosa Feltes Ochoa Teresa Puertolas Eva Muñoz-Couselo José Luis Manzano Ivan Marquez-Rodas Juan Martín-Liberal Ainara Soria Pilar Lopez Criado Almudena Garcia-Castaño Aram Boada Pablo Ayala de Miguel Susana Puig Guillermo Crespo Alfonso Berrocal 《Journal of the American Academy of Dermatology》2021,84(5):1412-1415
6.
7.
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
8.
Alexander Real Chierika Ukogu Divya Krishnamoorthy Nicole Zubizarreta Samuel K. Cho Andrew C. Hecht James C. Iatridis 《The spine journal》2019,19(2):225-231
Background Context
Low back pain (LBP) is a common complaint in clinical practice of multifactorial origin. Although obesity has been thought to contribute to LBP primarily by altering the distribution of mechanical loads on the spine, the additional contribution of obesity-related conditions such as diabetes mellitus (DM) to LBP has not been thoroughly examined.Purpose
To determine if there is a relationship between DM and LBP that is independent of body mass index (BMI) in a large cohort of adult survey participants.Study Design
Retrospective analysis of prospectively collected National Health and Nutrition Examination Survey (NHANES) data to characterize associations between LBP, DM, and BMI in adults subdivided into 6 subpopulations: normal weight (BMI 18.5–25), overweight (BMI 25–30), and obese (BMI >30) diabetics and nondiabetics. Diabetes was defined with glycohemoglobin A1c (HbA1c) ≥6.5%.Patient Sample
11,756 participants from NHANES cohort.Outcome Measures
Percentage of LBP reported.Methods
LBP reported in the 1999-2004 miscellaneous pain NHANES questionnaire was the dependent variable examined. Covariates included HbA1c, BMI, age, and family income ratio to poverty as continuous variables as well as race, gender, and smoking as binary variables. Individuals were further subdivided by weight class and diabetes status. Regression and graphical analyses were performed on the study population as a whole and also on subpopulations.Results
Increasing HbA1c did not increase the odds of reporting LBP in the full cohort. However, multivariate logistic regression of the 6 subpopulations revealed that the odds of LBP significantly increased with increasing HbA1c levels in normal weight diabetics. No other subpopulations reported significant relationships between LBP and HbA1c. LBP was also significantly associated with BMI for normal weight diabetics and also for obese subjects regardless of their DM status.Conclusions
LBP is significantly related to DM status, but this relationship is complex and may interact with BMI. These results support the concept that LBP may be improved in normal weight diabetic subjects with improved glycemic control and weight loss, and that all obese LBP subjects may benefit from improved weight loss alone. 相似文献9.
Familial risk and heritability of intellectual disability: a population-based cohort study in Sweden
10.
Distinct genetic alterations and luminal molecular subtype in nested variant of urothelial carcinoma