全文获取类型
收费全文 | 282559篇 |
免费 | 13593篇 |
国内免费 | 504篇 |
专业分类
耳鼻咽喉 | 3741篇 |
儿科学 | 8303篇 |
妇产科学 | 5774篇 |
基础医学 | 40127篇 |
口腔科学 | 7365篇 |
临床医学 | 22114篇 |
内科学 | 63094篇 |
皮肤病学 | 7390篇 |
神经病学 | 25340篇 |
特种医学 | 8205篇 |
外国民族医学 | 101篇 |
外科学 | 35798篇 |
综合类 | 1203篇 |
一般理论 | 82篇 |
预防医学 | 25482篇 |
眼科学 | 5553篇 |
药学 | 19645篇 |
中国医学 | 858篇 |
肿瘤学 | 16481篇 |
出版年
2023年 | 1530篇 |
2022年 | 995篇 |
2021年 | 4180篇 |
2020年 | 2495篇 |
2019年 | 4647篇 |
2018年 | 8846篇 |
2017年 | 5736篇 |
2016年 | 5825篇 |
2015年 | 6879篇 |
2014年 | 7122篇 |
2013年 | 11400篇 |
2012年 | 19965篇 |
2011年 | 19849篇 |
2010年 | 9815篇 |
2009年 | 7314篇 |
2008年 | 17169篇 |
2007年 | 18243篇 |
2006年 | 17269篇 |
2005年 | 16926篇 |
2004年 | 15764篇 |
2003年 | 14388篇 |
2002年 | 13696篇 |
2001年 | 7427篇 |
2000年 | 7949篇 |
1999年 | 6375篇 |
1998年 | 1071篇 |
1997年 | 870篇 |
1996年 | 840篇 |
1995年 | 771篇 |
1992年 | 3315篇 |
1991年 | 2970篇 |
1990年 | 2810篇 |
1989年 | 2574篇 |
1988年 | 2425篇 |
1987年 | 2245篇 |
1986年 | 2159篇 |
1985年 | 1952篇 |
1984年 | 1482篇 |
1983年 | 1241篇 |
1979年 | 1242篇 |
1978年 | 879篇 |
1977年 | 828篇 |
1975年 | 825篇 |
1974年 | 1018篇 |
1973年 | 1027篇 |
1972年 | 944篇 |
1971年 | 940篇 |
1970年 | 874篇 |
1969年 | 916篇 |
1968年 | 794篇 |
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
31.
32.
33.
34.
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
35.
A. Guerrero Gómez N. González Jaramillo J.A. Castro Pérez 《Revista espa?ola de anestesiología y reanimación》2019,66(1):10-17
Introduction
The fast track / ultra-fast-track protocols are techniques used to optimise the patient care process and a quick recovery after cardiac surgery. They are one of the mainstays of efficient practice. With their use, the length of hospital and intensive care unit (ICU) stays are reduced, with a direct impact on costs and the quality of the health service.Objective
To compare the length of stay in the ICU, length of hospital stay, and post-operative mortality in ultra-fast-track extubated (uFTE) patients and those with conventional extubation (CE) after cardiac surgery.Methods
Longitudinal, analytical, retrospective study was conducted, with the period between the time of surgery and discharge being included as the study period.Results
A total of 396 patients older than 18 years who required cardiac surgery were included, of whom 207 patients had (uFTE) and 189 had CE. Although the groups were not comparable due to the statistical differences found, when performing the multivariate adjustment, uFTE maintained its statistical independence and was associated with lower cardiovascular morbidity, such as myocardial ischaemia (95% CI: 0.37-0.86; P = .01) and lower post-surgical vasopressor requirement (95% CI: 0.18-0.49; P < .01). No significant differences were found in the length of hospital stay, ICU stay, or post-operative mortality in the ICU.Conclusion
Implementing the uFTE strategy, decreases cardiovascular morbidity and vasopressor requirement. The change to uFTE should be accompanied by changes in models and practices in patient recovery to standardised protocols. This study shows that uFTE did not reduce the length of ICU stay, hospital stay, or mortality. 相似文献36.
37.
Luis Miguel Azogil-López Juan José Pérez-Lázaro Patricia Ávila-Pecci Esther María Medrano-Sánchez María Valle Coronado-Vázquez 《Atencion primaria / Sociedad Espa?ola de Medicina de Familia y Comunitaria》2019,51(5):278-284
Aim
The purpose of this study is to find out whether telephone referral from Primary Health Care to Internal Medicine Consult manages to reduce waiting days as compared to traditional referral. This study also aims to know how acceptable is the telephone referral to general practitioners and their patients.Design
No blind randomized controlled clinical trial.Setting
Northern Huelva Health District.Participants
154 patients.Interventions
Patients referrals from intervention clinicians were sent via telephone consultation, whereas patients referrals from control clinicians were sent by traditional via.Measurements
Number of days from referral request to Internal Medicine Consult. Number of telephone and traditional referrals. Number of doctors and patients denied. Denial reasons.Results
A statistically significant difference was found between groups, with an average of 27 (21-34) days. Among General Practitioners, 8 of the first 58 total doctors after randomization and, subsequently, 6 of the 20 doctors of the test group refused to engage in the trial because they considered “excessive time and effort consuming”. 50% of patients referred by the 14 General Practitioners finally randomized to the intervention group were denied referral by telephone due to patient's complexity.Conclusions
Telephone referral significantly reduces waiting days for Internal Medicine consult. This type of referral did not mean an “excessive time and effort consuming” to General Practitioners and was not all that beneficial to complex patients 相似文献38.
39.
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
40.
Carlos A. ávila-Orta Zoe V. Qui?ones-Jurado Miguel A. Waldo-Mendoza Erika A. Rivera-Paz Víctor J. Cruz-Delgado José M. Mata-Padilla Pablo González-Morones Ronald F. Ziolo 《Materials》2015,8(11):7900-7912
Isotactic polypropylenes (iPP) with different melt flow indexes (MFI) were used to fabricate nanocomposites (NCs) with 10 wt % loadings of multi-wall carbon nanotubes (MWCNTs) using ultrasound-assisted extrusion methods to determine their effect on the morphology, melt flow, and electrical properties of the NCs. Three different types of iPPs were used with MFIs of 2.5, 34 and 1200 g/10 min. Four different NC fabrication methods based on melt extrusion were used. In the first method melt extrusion fabrication without ultrasound assistance was used. In the second and third methods, an ultrasound probe attached to a hot chamber located at the exit of the die was used to subject the sample to fixed frequency and variable frequency, respectively. The fourth method is similar to the first method, with the difference being that the carbon nanotubes were treated in a fluidized air-bed with an ultrasound probe before being used in the fabrication of the NCs with no ultrasound assistance during extrusion. The samples were characterized by MFI, Optical microscopy (OM), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), electrical surface resistivity, and electric charge. MFI decreases in all cases with addition of MWCNTs with the largest decrease observed for samples with the highest MFI. The surface resistivity, which ranged from 1013 to 105 Ω/sq, and electric charge, were observed to depend on the ultrasound-assisted fabrication method as well as on the melt flow index of the iPP. A relationship between agglomerate size and area ratio with electric charge was found. Several trends in the overall data were identified and are discussed in terms of MFI and the different fabrication methods. 相似文献