全文获取类型
| 收费全文 | 6420篇 |
| 免费 | 424篇 |
| 国内免费 | 13篇 |
专业分类
| 耳鼻咽喉 | 145篇 |
| 儿科学 | 207篇 |
| 妇产科学 | 472篇 |
| 基础医学 | 788篇 |
| 口腔科学 | 117篇 |
| 临床医学 | 537篇 |
| 内科学 | 1568篇 |
| 皮肤病学 | 206篇 |
| 神经病学 | 516篇 |
| 特种医学 | 158篇 |
| 外科学 | 898篇 |
| 综合类 | 26篇 |
| 一般理论 | 1篇 |
| 预防医学 | 471篇 |
| 眼科学 | 94篇 |
| 药学 | 355篇 |
| 中国医学 | 22篇 |
| 肿瘤学 | 276篇 |
出版年
| 2023年 | 27篇 |
| 2022年 | 67篇 |
| 2021年 | 175篇 |
| 2020年 | 82篇 |
| 2019年 | 197篇 |
| 2018年 | 261篇 |
| 2017年 | 136篇 |
| 2016年 | 133篇 |
| 2015年 | 144篇 |
| 2014年 | 222篇 |
| 2013年 | 264篇 |
| 2012年 | 317篇 |
| 2011年 | 391篇 |
| 2010年 | 255篇 |
| 2009年 | 245篇 |
| 2008年 | 345篇 |
| 2007年 | 406篇 |
| 2006年 | 342篇 |
| 2005年 | 335篇 |
| 2004年 | 298篇 |
| 2003年 | 252篇 |
| 2002年 | 265篇 |
| 2001年 | 211篇 |
| 2000年 | 260篇 |
| 1999年 | 185篇 |
| 1998年 | 61篇 |
| 1997年 | 34篇 |
| 1996年 | 34篇 |
| 1995年 | 30篇 |
| 1994年 | 34篇 |
| 1993年 | 27篇 |
| 1992年 | 102篇 |
| 1991年 | 82篇 |
| 1990年 | 94篇 |
| 1989年 | 71篇 |
| 1988年 | 86篇 |
| 1987年 | 56篇 |
| 1986年 | 56篇 |
| 1985年 | 33篇 |
| 1984年 | 34篇 |
| 1983年 | 17篇 |
| 1982年 | 12篇 |
| 1979年 | 14篇 |
| 1978年 | 9篇 |
| 1977年 | 15篇 |
| 1976年 | 11篇 |
| 1975年 | 14篇 |
| 1974年 | 22篇 |
| 1973年 | 21篇 |
| 1972年 | 17篇 |
排序方式： 共有6857条查询结果，搜索用时 15 毫秒
1.
2.
Rocha Déborah Ribeiro Nery Jaqueline Freire Furini Leonardo Negri Constantino Carlos José Leopoldo Eller Lizziane Kretli Winkelströter Nai Gisele Alborghetti Nakagaki Wilson Romero 《Lasers in medical science》2020,35(8):1703-1709
Lasers in Medical Science - Studies reported the harmful effects of 2,4-D on body tissues, provoking changes in the anatomy and physiology of the kidneys, liver, and testicles. Thus, the objective... 相似文献
3.
Accuracy and Precision of Acetabular Component Placement With Imageless Navigation in Obese Patients
Leonard T. Buller Alexander S. McLawhorn Jose A. Romero Peter K. Sculco David J. Mayman 《The Journal of arthroplasty》2019,34(4):693-699
Background
Obesity is a risk factor for acetabular component malposition when total hip arthroplasty is performed with manual techniques. The utility of imageless navigation in obese patients remains unknown. This study compared the accuracy and precision of imageless navigation for component orientation between obese and nonobese patients.Methods
A total of 459 total hip arthroplasties performed for osteoarthritis using imageless navigation were reviewed from a single surgeon’s institutional review board–approved database. Einzel-Bild-Roentgen Analyse determined component orientation on 6-week postoperative anteroposterior radiographs. Mean orientation error (accuracy) and precision were compared between obese (body mass index ≥ 30 kg/m2) and nonobese patients. Regression analysis evaluated the influence of obesity on component position.Results
The difference in mean inclination and anteversion between obese and nonobese groups was 1.1° (43.0° ± 3.5°; range, 35.8°-57.8° vs 41.9° ± 4.4°; range, 33.0°-57.1° and 24.9° ± 6.3°; range, 14.2°-44.3° vs 23.8° ± 6.6°; range, 7.0°-38.6°, respectively). Inclination precision was better for nonobese patients. No difference in inclination accuracy or anteversion accuracy or precision was detected between groups. And 83% of components were placed within the target range. There was no relationship between obesity (dichotomized) and component placement outside the target ranges for inclination, anteversion, or both. As a continuous variable, increased body mass index correlated with higher odds of inclination outside the target zone (odds ratio, 1.06; P = .001).Conclusion
Using imageless navigation, inclination orientation was less precise for obese patients, but the observed difference is likely not clinically relevant. Accurate superficial registration of landmarks in obese patients is achievable, and the use of imageless navigation similarly improves acetabular component positioning in obese and nonobese patients.Level of Evidence
Therapeutic Level IV. 相似文献4.
5.
Lee Mi Jung Romero Sergio Velozo Craig A. Gruber-Baldini Ann L. Shulman Lisa M. 《Quality of life research》2019,28(6):1595-1603
Quality of Life Research - This study investigated the PROMIS Self-Efficacy Measure for Managing Chronic Conditions (PROMIS-SE) domain distributions and examined the factor structure of the... 相似文献
6.
7.
María Cabrerizo Gloria Trallero María José Pena Amaia Cilla Gregoria Megias Carmen Mu?oz-Almagro Eva Del Amo Diana Roda Ana Isabel Mensalvas Antonio Moreno-Docón Juan García-Costa Nuria Rabella Manuel Ome?aca María Pilar Romero Sara Sanbonmatsu-Gámez Mercedes Pérez-Ruiz María José Santos-Mu?oz Cristina Calvo And the study group of “Enterovirus parechovirus infections in children under ?years-old Spain” PI- 《European journal of pediatrics》2015,174(11):1511-1516
8.
9.
F. Degoul M. Diry F. Viader E. Boitier C. Marsac B. Eymard N. Romero M. B. Delisle B. Lechevalier F. Chapon 《European journal of neurology》1995,2(6):573-579
We have identified the A3243G heteroplasmic point mutation in mitochondrial DNA from a female patient with headache as the main clinical feature. The mitochondrial origin of her disease was only suspected because of her brother with MELAS syndrome. Morphological and biochemical studies failed to reveal mitochondrial respiratory chain dysfunction in her muscle which contained 65% of mutated mitochondrial DNA molecules. Molecular studies performed among four generations (in the blood of seven subjects) showed the variable transmission of mutated molecules and pointed out the difficulty in giving genetic counsel. 相似文献
10.
Computed tomography angiogram of the head and neck has lately become a pivotal imaging modality in the patient with acute stroke symptoms due to its high resolution, accuracy, speed, and sensitivity in the assessment of brain parenchyma and vascular patency. 相似文献