全文获取类型
收费全文 | 2251篇 |
免费 | 159篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 14篇 |
儿科学 | 85篇 |
妇产科学 | 68篇 |
基础医学 | 241篇 |
口腔科学 | 37篇 |
临床医学 | 169篇 |
内科学 | 499篇 |
皮肤病学 | 131篇 |
神经病学 | 250篇 |
特种医学 | 100篇 |
外科学 | 289篇 |
综合类 | 26篇 |
一般理论 | 1篇 |
预防医学 | 130篇 |
眼科学 | 64篇 |
药学 | 153篇 |
中国医学 | 1篇 |
肿瘤学 | 157篇 |
出版年
2023年 | 10篇 |
2021年 | 46篇 |
2020年 | 37篇 |
2019年 | 80篇 |
2018年 | 76篇 |
2017年 | 46篇 |
2016年 | 55篇 |
2015年 | 46篇 |
2014年 | 67篇 |
2013年 | 74篇 |
2012年 | 102篇 |
2011年 | 111篇 |
2010年 | 77篇 |
2009年 | 75篇 |
2008年 | 123篇 |
2007年 | 98篇 |
2006年 | 120篇 |
2005年 | 99篇 |
2004年 | 94篇 |
2003年 | 74篇 |
2002年 | 79篇 |
2001年 | 56篇 |
2000年 | 95篇 |
1999年 | 56篇 |
1998年 | 43篇 |
1997年 | 32篇 |
1996年 | 27篇 |
1995年 | 26篇 |
1994年 | 17篇 |
1993年 | 23篇 |
1992年 | 39篇 |
1991年 | 35篇 |
1990年 | 30篇 |
1989年 | 40篇 |
1988年 | 25篇 |
1987年 | 21篇 |
1986年 | 27篇 |
1985年 | 22篇 |
1984年 | 23篇 |
1983年 | 12篇 |
1982年 | 11篇 |
1981年 | 12篇 |
1980年 | 14篇 |
1979年 | 10篇 |
1978年 | 10篇 |
1976年 | 13篇 |
1975年 | 17篇 |
1973年 | 17篇 |
1972年 | 10篇 |
1967年 | 10篇 |
排序方式: 共有2415条查询结果,搜索用时 15 毫秒
1.
2.
Menezes-Silva Rafael Velasco S. R. M. Bastos R. S. Molina G. Honório H. M. Frencken J. E. Navarro M. F. L. 《Clinical oral investigations》2019,23(9):3623-3635
Clinical Oral Investigations - This study evaluated the effectiveness of class II restorations, in permanent teeth, through the ART technique in comparison to composite resin. Participants (154),... 相似文献
3.
4.
Guido Cavaletti David R. Cornblath Ingemar S.J. Merkies Tjeerd J. Postma Emanela Rossi Paola Alberti Jordi Bruna Andreas A. Argyriou Chiara Briani Roser Velasco Haralabos P. Kalofonos Dimitri Psimaras Damien Ricard Andrea Pace Catharina G. Faber Roy I. Lalisang Dieta Brandsma Susanne Koeppen Simon Kerrigan Angelo Schenone Wolfgang Grisold Anna Mazzeo Luca Padua Susan G. Dorsey Marta Penas‐Prado Maria G. Valsecchi 《Journal of the peripheral nervous system : JPNS》2019,24(1):111-119
To test if and how chemotherapy‐induced peripheral neurotoxicity (CIPN) is perceived differently by patients and physicians, making assessment and interpretation challenging. We performed a secondary analysis of the CI‐PeriNomS study which included 281 patients with stable CIPN. We tested: (a) the association between patients' perception of activity limitation in performing eight common tasks and neurological impairment and (b) how the responses to questions related to these daily activities are interpreted by the treating oncologist. To achieve this, we compared patients' perception of their activity limitation with neurological assessment and the oncologists' blind interpretation. Distribution of the scores attributed by oncologists to each daily life maximum limitation (“impossible”) generated three groups: Group 1 included limitations oncologists attributed mainly to motor impairment; Group 2 ones mainly attributed to sensory impairment and Group 3 ones with uncertain motor and sensory impairment. Only a subset of questions showed a significant trend between severity in subjective limitation, reported by patients, and neurological impairment. In Group 1, neurological examination confirmed motor impairment in only 51%‐65% of patients; 76%‐78% of them also had vibration perception impairment. In Group 2, sensory impairment ranged from 84% to 100%; some degree of motor impairment occurred in 43%‐56% of them. In Group 3 strength reduction was observed in 49%‐50% and sensory perception was altered in up to 82%. Interpretation provided by the panel of experienced oncologists was inconsistent with the neurological impairment. These observations highlight the need of a core set of outcome measures for future CIPN trials. 相似文献
5.
Cristina García-Amador Vladimir Arteaga Peralta Roberto de la Plaza Llamas Miguel Torralba Anibal Medina Velasco José Manuel Ramia 《Cirugía espa?ola》2021,99(4):282-288
BackgroundTo analyze whether clinical and analytical parameters differ according to histopathology in cases of acute appendicitis (AA).MethodsThis is a retrospective, observational study including patients (>14 years of age) admitted for suspicion of AA from 1 April 2014 to 31 July 2016. Histopathology was divided into complicated (including perforated and gangrenous AA) and uncomplicated appendicitis (phlegmonous). Sex, age, temperature of patients on admission to the Emergency Department, symptom duration, preoperative white blood cell (WBC) count, neutrophil percentage, mean platelet volume (MPV), platelet distribution width (PDW), C-reactive protein (CRP) and hospital stay were compared in the two groups.ResultsThree hundred and thirty-five patients were analyzed, and 284 were included. Appendicitis was uncomplicated in 194 (68.3%) and complicated in 90 (31.7%). Age, symptom duration, neutrophil percentage, CRP and hospital stay were higher in the complicated AA group (P < .05). The mean differences between uncomplicated and complicated AA were: age 13.2 years (95% CI: 8.2-18.2), symptom duration 14.1 hours (95% CI: 6.3-21.9), neutrophil percentage 5.0% (95% CI: 3.2-6.8), CRP 73.6 mg/l (95% CI: 50.0-97.2) and hospital stay 2.2 days (95% CI: 1.4-3.0), with p<0.05 for all these variables. A model based on the preoperative parameters (age, symptom duration, neutrophil percentage and CRP) was calculated to predict the likelihood of complicated AA. The receiver operating characteristic (ROC) of the model had an area under the curve of 0.80 (95% CI 0.75-0.85).ConclusionThis model is able to diagnose complicated AA without the need for imaging techniques, although it must be validated with prospective analysis. 相似文献
6.
Ignacio Mejía‐Calvo Leonardo E. Lpez‐Jurez Said Vzquez‐Leyva Carlos A. Lpez‐Morales Daniel Montoya‐Escutia Pamela G. Merlos Rivera Jos Enrique Herbert‐Pucheta Luis Gerardo Zepeda‐Vallejo Marco Velasco‐Velzquez Lenin Pavn Sonia M. Prez‐Tapia Emilio Medina‐Rivero 《Journal of Cosmetic Dermatology》2021,20(1):150-158
7.
Juan C. Diaz MD Jorge Romero MD Roberto Costa MD Alejandro Cuesta MD Luigi D. Biase MD Isabella Alviz MD Alejandro Velasco MD Mohamed Gabr MD Mauricio Duque MD Jorge E. Marin MD Julian Aristizabal MD Jorge Velasquez Cesar D. Niño MD Hector Mazzetti MD 《Journal of cardiovascular electrophysiology》2021,32(10):2715-2721
8.
Pedro Lpez‐Fernndez Jorge Murillo‐Gonzlez Luis Alfonso Arrez‐Aybar Crtida de la Cuadra‐Blanco Alicia Moreno‐Borreguero Jos Ramn Mrida‐Velasco 《Journal of anatomy》2019,235(6):1098-1104
In recent years, there has been much discussion concerning the cervical fasciae. The aim of this study is to confirm and to describe the development of the alar fascia as well as its relationship with nearby structures. Histological preparations of 25 human embryos (6–8 weeks of development) and 25 human fetuses (9–12 weeks of development) were studied bilaterally using a conventional optical microscope. Our study confirms the existence of the alar fascia and permits three stages to be established during its development. The initial stage (1st), corresponding to the 6th week of development (Carnegie stages 18–19), is characterized by the beginning of the alar fascia primordium in the retroesophageal space at the level of C7‐T1. In the formation stage (2nd), corresponding to the 7th and 8th weeks of development (Carnegie stages 20–23), the alar fascia primordium grows upwards and reaches the level of C2–C3. In the maturation stage (3rd), beginning in the 9th week of development, the visceral, alar and prevertebral fasciae can be identified. The alar fascia divides the retrovisceral space (retropharyngeal and retroesophageal) into two spaces: one anterior (between the alar fascia and the visceral fascia and extending from C1 to T1, named retropharyngeal or retroesophageal space according to the level) and the other posterior (between the alar fascia and the prevertebral fascia, named danger space). We suggest that this latter space be named the retroalar space. This study suggests that alar fascia development is related to mechanical factors and that the alar fascia permits the sliding of the pharynx and the oesophagus during swallowing. 相似文献
9.