全文获取类型
收费全文 | 166838篇 |
免费 | 7928篇 |
国内免费 | 507篇 |
专业分类
耳鼻咽喉 | 2382篇 |
儿科学 | 5392篇 |
妇产科学 | 4547篇 |
基础医学 | 22971篇 |
口腔科学 | 4625篇 |
临床医学 | 11178篇 |
内科学 | 38218篇 |
皮肤病学 | 5474篇 |
神经病学 | 13588篇 |
特种医学 | 4128篇 |
外国民族医学 | 31篇 |
外科学 | 21240篇 |
综合类 | 886篇 |
一般理论 | 38篇 |
预防医学 | 17135篇 |
眼科学 | 3391篇 |
药学 | 11956篇 |
中国医学 | 528篇 |
肿瘤学 | 7565篇 |
出版年
2023年 | 903篇 |
2022年 | 1503篇 |
2021年 | 3612篇 |
2020年 | 1900篇 |
2019年 | 3561篇 |
2018年 | 4879篇 |
2017年 | 3090篇 |
2016年 | 3100篇 |
2015年 | 3430篇 |
2014年 | 4490篇 |
2013年 | 6659篇 |
2012年 | 9982篇 |
2011年 | 10283篇 |
2010年 | 5707篇 |
2009年 | 4927篇 |
2008年 | 8428篇 |
2007年 | 8901篇 |
2006年 | 8669篇 |
2005年 | 8678篇 |
2004年 | 8096篇 |
2003年 | 7518篇 |
2002年 | 7220篇 |
2001年 | 5256篇 |
2000年 | 5418篇 |
1999年 | 4520篇 |
1998年 | 1318篇 |
1997年 | 966篇 |
1996年 | 942篇 |
1995年 | 777篇 |
1994年 | 663篇 |
1992年 | 2255篇 |
1991年 | 2153篇 |
1990年 | 2008篇 |
1989年 | 1786篇 |
1988年 | 1637篇 |
1987年 | 1602篇 |
1986年 | 1500篇 |
1985年 | 1436篇 |
1984年 | 1040篇 |
1983年 | 897篇 |
1979年 | 1008篇 |
1978年 | 675篇 |
1975年 | 687篇 |
1974年 | 882篇 |
1973年 | 854篇 |
1972年 | 740篇 |
1971年 | 693篇 |
1970年 | 747篇 |
1969年 | 706篇 |
1968年 | 669篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
José A. Lorente Pablo Cardinal-Fernández Diego Muñoz Fernando Frutos-Vivar Arnaud W. Thille Carlos Jaramillo Aida Ballén-Barragán José M. Rodríguez Oscar Peñuelas Guillermo Ortiz José Blanco Bruno Valle Pinheiro Nicolás Nin María del Carmen Marin Andrés Esteban Taylor B. Thompson 《Intensive care medicine》2015,41(11):1921-1930
62.
J. Alarcón-Rodríguez M. Fernández-Velilla A. Ureña-Vacas J.J. Martín-Pinacho J.A. Rigual-Bobillo A. Jaureguízar-Oriol L. Gorospe-Sarasúa 《Radiologia》2021,63(3):258-269
Most of the patients who overcome the SARS-CoV-2 infection do not present complications and do not require a specific follow-up, but a significant proportion (especially those with moderate / severe clinical forms of the disease) require clinicalradiological follow-up. Although there are hardly any references or clinical guidelines regarding the long-term follow-up of post-COVID-19 patients, radiological exams are being performed and monographic surveillance consultations are being set up in most of the hospitals to meet their needs. The purpose of this work is to share our experience in the management of the post-COVID-19 patient in two institutions thathave had a high incidence of COVID-19 and to propose general follow-uprecommendations from a clinical and radiological perspective. 相似文献
63.
Samira Marín-Romero Teresa Elías-Hernández María Isabel Asensio-Cruz Rocío Ortega-Rivera Raquel Morillo-Guerrero Javier Toral Emilio Montero Verónica Sánchez Elena Arellano José María Sánchez-Díaz Macarena Real-Domínguez Remedios Otero-Candelera Luis Jara-Palomares 《Archivos de bronconeumología》2019,55(12):619-626
IntroductionScales for predicting venous thromboembolism (VTE) recurrence are useful for deciding the duration of the anticoagulant treatment. Although there are several scales, the most appropriate for our setting has not been identified. For this reason, we aimed to validate the DASH prediction score and the Vienna nomogram at 12 months.MethodsThis was a retrospective study of unselected consecutive VTE patients seen between 2006 and 2014. We compared the ability of the DASH score and the Vienna nomogram to predict recurrences of VTE. The validation was performed by stratifying patients as low-risk or high-risk, according to each scale (discrimination) and comparing the observed recurrence with the expected rate (calibration).ResultsOf 353 patients evaluated, 195 were analyzed, with an average age of 53.5 ± 19 years. There were 21 recurrences in 1 year (10.8%, 95% CI: 6.8%-16%). According to the DASH score, 42% were classified as low risk, and the rate of VTE recurrence in this group was 4.9% (95% CI: 1.3%-12%) vs. the high-risk group that was 15% (95% CI: 9%-23%) (p <.05). According to the Vienna nomogram, 30% were classified as low risk, and the rate of VTE recurrence in the low risk group vs. the high risk group was 4.2% (95% CI:0.5%-14%) vs. 16.2% (95% CI: 9.9%-24.4%) (p <.05).ConclusionsOur study validates the DASH score and the Vienna nomogram in our population. The DASH prediction score may be the most advisable, both because of its simplicity and its ability to identify more low-risk patients than the Vienna nomogram (42% vs. 30%). 相似文献
64.
65.
66.
67.
68.
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
69.
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70.