全文获取类型
收费全文 | 10415篇 |
免费 | 813篇 |
国内免费 | 25篇 |
专业分类
耳鼻咽喉 | 116篇 |
儿科学 | 246篇 |
妇产科学 | 161篇 |
基础医学 | 1170篇 |
口腔科学 | 267篇 |
临床医学 | 1122篇 |
内科学 | 1813篇 |
皮肤病学 | 95篇 |
神经病学 | 909篇 |
特种医学 | 392篇 |
外科学 | 1976篇 |
综合类 | 131篇 |
一般理论 | 5篇 |
预防医学 | 1057篇 |
眼科学 | 162篇 |
药学 | 915篇 |
中国医学 | 6篇 |
肿瘤学 | 710篇 |
出版年
2023年 | 45篇 |
2022年 | 98篇 |
2021年 | 264篇 |
2020年 | 160篇 |
2019年 | 241篇 |
2018年 | 294篇 |
2017年 | 232篇 |
2016年 | 238篇 |
2015年 | 283篇 |
2014年 | 402篇 |
2013年 | 521篇 |
2012年 | 834篇 |
2011年 | 744篇 |
2010年 | 417篇 |
2009年 | 342篇 |
2008年 | 574篇 |
2007年 | 616篇 |
2006年 | 551篇 |
2005年 | 584篇 |
2004年 | 526篇 |
2003年 | 506篇 |
2002年 | 430篇 |
2001年 | 131篇 |
2000年 | 122篇 |
1999年 | 151篇 |
1998年 | 89篇 |
1997年 | 69篇 |
1996年 | 65篇 |
1995年 | 57篇 |
1994年 | 53篇 |
1993年 | 53篇 |
1992年 | 82篇 |
1991年 | 80篇 |
1990年 | 82篇 |
1989年 | 75篇 |
1988年 | 72篇 |
1987年 | 64篇 |
1986年 | 68篇 |
1985年 | 58篇 |
1984年 | 81篇 |
1983年 | 65篇 |
1982年 | 47篇 |
1981年 | 59篇 |
1980年 | 45篇 |
1979年 | 56篇 |
1978年 | 65篇 |
1977年 | 55篇 |
1976年 | 60篇 |
1974年 | 60篇 |
1973年 | 61篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
23.
24.
This study assessed the capabilities of a traditional and an amplified stethoscope used by flight nurses to assess breath sound during air medical transport in an MBB BO-105 helicopter. We developed a normal breath sound model using a prerecorded tape of breath sounds interspersed with segments without breath sounds; the recorder had been placed in the chest wall of a resuscitation training manikin. Flight nurses completed control listening sessions in a quiet environment and experimental sessions during flight using a traditional stethoscope for half of the sessions and an amplified stethoscope for the remaining half. In the quiet environment, flight nurses accurately reported the presence or absence of breath sounds in 110 (92%) of 120 trials. During helicopter flight, none of the flight nurses heard breath sounds during any of the recorded segments with either the traditional stethoscope or the amplified stethoscope. We conclude that flight nurses are unable to hear normal breath sounds using a traditional or amplified stethoscope during flight in a medically configured MBB BO-105 helicopter. Improved stethoscopes, innovative methods of listening, and reduction of aircraft noise are potential solutions to the problems of breath sound assessment during air medical transport. 相似文献
25.
James K. Hartsfield Bryan D. Hall Arthur W. Grix Boris G. Kousseff Jose F. Salazar Scott M. W. Haufe 《American journal of medical genetics. Part A》1993,45(5):552-557
We report on 7 patients (6 M, 1 F) with Coffin-Lowry syndrome who have a sensorineural hearing deficit in addition to developmental delay and characteristic facial changes. One of the patients also had a history of premature exfoliation of primary teeth. These are previously unappreciated clinical signs that may aid in the early diagnosis of Coffin-Lowry syndrome. Early diagnosis and recognition of a hearing deficit in the patient can lead to the use of hearing aids to help the patient achieve his or her full potential. These “;new”; clinical manifestations expand the phenotype of Coffin-Lowry syndrome and constitute an additional indication of pleiotropy. © 1993 Wiley-Liss, Inc. 相似文献
26.
Bryan D Stone Johnny J Choi 《Annals of allergy, asthma & immunology》2002,88(5):532; author reply 532-532; author reply 533
27.
Bernard Stuart Declan Fox Harry Murphy Bryan Lynch J. Loftus E. Naughten I. Saul O. Sheil N. Duignan A. Jackson W. A. Gorman G. Fox T. Matthews T. Clarke Mark M. Reid H. L. Halliday B. G. McClure P. S. Thomas Michael O’Dowd Michael J. O’Dowd Kevin Connolly F. Leahy Dr. R. G. White Ruth Connolly Colm O’Herlihy Alicja Radic Dr. 《Irish journal of medical science》1986,155(6):209-212
28.
29.
30.
PURPOSE: Epilepsies in children are complex diseases. Guidelines are needed on the appropriate use of newer versus older anti-epileptic drugs (AEDs). This paper presents an individual patient-sampling model to assess the cost-effectiveness of using newer AEDs as add-on therapy in line with UK prescribing guidance. METHODS: Identification of the relevant parameters and treatment pathways for the model were achieved by a systematic review of the literature and discussions with clinical experts. Data were obtained from the literature and supplemented with data elicited from paediatric neurologists. The model considered paediatric patients over the period of childhood from the age of diagnosis to 18 years. RESULTS: The results suggest that the older and newer AEDs are similar in terms of drug retention rates and the average time in 'good' treatment outcomes. In terms of cost, the results indicate a consistent increase in cost (compared to older AEDs) when all of the newer AEDs are considered. The decision analysis results indicate that there are no important health benefits from the use of newer AEDs when used as add-on therapy. However, the analysis also reveals that the uncertainties in the model are greater than the differences between the drug strategies. CONCLUSIONS: To develop guidelines on the appropriate use of newer AEDs, better information is required from randomised controlled trials as there is insufficient data available in the public domain to accurately estimate the nature of the trade off between older versus newer AEDs. 相似文献