全文获取类型
收费全文 | 27204篇 |
免费 | 2084篇 |
国内免费 | 81篇 |
专业分类
耳鼻咽喉 | 404篇 |
儿科学 | 715篇 |
妇产科学 | 526篇 |
基础医学 | 3258篇 |
口腔科学 | 375篇 |
临床医学 | 2737篇 |
内科学 | 6199篇 |
皮肤病学 | 643篇 |
神经病学 | 2376篇 |
特种医学 | 914篇 |
外科学 | 3755篇 |
综合类 | 499篇 |
现状与发展 | 1篇 |
一般理论 | 25篇 |
预防医学 | 2780篇 |
眼科学 | 621篇 |
药学 | 1705篇 |
中国医学 | 27篇 |
肿瘤学 | 1809篇 |
出版年
2023年 | 162篇 |
2022年 | 258篇 |
2021年 | 551篇 |
2020年 | 347篇 |
2019年 | 511篇 |
2018年 | 657篇 |
2017年 | 457篇 |
2016年 | 524篇 |
2015年 | 596篇 |
2014年 | 853篇 |
2013年 | 1225篇 |
2012年 | 1744篇 |
2011年 | 1786篇 |
2010年 | 1018篇 |
2009年 | 923篇 |
2008年 | 1541篇 |
2007年 | 1716篇 |
2006年 | 1674篇 |
2005年 | 1619篇 |
2004年 | 1624篇 |
2003年 | 1407篇 |
2002年 | 1242篇 |
2001年 | 459篇 |
2000年 | 427篇 |
1999年 | 406篇 |
1998年 | 329篇 |
1997年 | 248篇 |
1996年 | 207篇 |
1995年 | 225篇 |
1994年 | 178篇 |
1993年 | 178篇 |
1992年 | 324篇 |
1991年 | 285篇 |
1990年 | 245篇 |
1989年 | 230篇 |
1988年 | 249篇 |
1987年 | 227篇 |
1986年 | 226篇 |
1985年 | 218篇 |
1984年 | 183篇 |
1983年 | 158篇 |
1982年 | 136篇 |
1981年 | 153篇 |
1980年 | 122篇 |
1979年 | 131篇 |
1978年 | 134篇 |
1977年 | 107篇 |
1976年 | 97篇 |
1975年 | 100篇 |
1973年 | 119篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Stephen R. Kisely Mike Wise Neil Preston Senia Malmgren Peter Shannon 《Australian and New Zealand journal of public health》2003,27(3):261-263
Objectives: To evaluate a group intervention to help individuals with psychiatric disorder stop smoking.
Method: A waitlist-treatment crossover design. Outcome measures included smoking cessation, motivation to stop, the Fagerstrom Test for Nicotine Dependence (FTND), urinary cotinine and psychiatric symptoms on the General Health Questionnaire.
Results: 38 subjects participated, of whom 19 completed the waitlist and intervention phases. There were no significant differences between subjects and dropouts. During the waitlist period there were no significant changes in tobacco use. At the end of the intervention, almost a quarter had stopped smoking, ( z = -2.24, p =0.02). Subjects also showed significant improvements on state of change, FTND score and urinary cotinine levels. These improvements were maintained at three-month follow-up (n=10). Psychiatric morbidity showed no change.
Conclusions: It is possible to reduce smoking in individuals with psychiatric disorder.
Implications: Larger randomised controlled trials are indicated to determine the relative contributions of nicotine replacement, bupropion and group interventions to smoking cessation in this population. 相似文献
Method: A waitlist-treatment crossover design. Outcome measures included smoking cessation, motivation to stop, the Fagerstrom Test for Nicotine Dependence (FTND), urinary cotinine and psychiatric symptoms on the General Health Questionnaire.
Results: 38 subjects participated, of whom 19 completed the waitlist and intervention phases. There were no significant differences between subjects and dropouts. During the waitlist period there were no significant changes in tobacco use. At the end of the intervention, almost a quarter had stopped smoking, ( z = -2.24, p =0.02). Subjects also showed significant improvements on state of change, FTND score and urinary cotinine levels. These improvements were maintained at three-month follow-up (n=10). Psychiatric morbidity showed no change.
Conclusions: It is possible to reduce smoking in individuals with psychiatric disorder.
Implications: Larger randomised controlled trials are indicated to determine the relative contributions of nicotine replacement, bupropion and group interventions to smoking cessation in this population. 相似文献
72.
73.
Jonathan Cook Neil Prose Mitchell Heflin 《Dermatologic surgery》2003,29(9):1994; author reply 1994-1994; author reply 1995
74.
Conor Armstrong Séamus S. Napier Robert C. Boyd Terry A. Gregg 《Journal of oral pathology & medicine》2004,33(4):246-248
Histological examination of the deciduous teeth in two cases of segmental odontomaxillary dysplasia (SOMD) showed fibrous enlargement of the pulps, an irregular pulp/dentine interface displaying many pseudoinclusions and pulp stones. There were tubular defects in the coronal dentine from pulp horn to cusp tip, an irregular tubular structure to the circumpulpal dentine of the apical half, a focally deficient odontoblast layer and widespread external resorption. Together with the clinical features of unilateral maxillary enlargement, upper alveolar expansion in the distal segment, increased spacing and delayed eruption of the deciduous molars and absence of premolar teeth, these histological appearances allow distinction of this condition from fibrous dysplasia (FD), segmental hemifacial hypertrophy (SHH) and regional odontodysplasia (ROD). 相似文献
75.
Yasser Samman Imran Masood Vijay Vardhan Killampalli Neil Howell E. Kaya Alpar Sunil K. Banerjee 《European Journal of Trauma》2005,31(2):133-137
Background and Purpose:
Management of rib fractures constitutes a major part of the trauma workload of any unit. Rib fractures result in disrupted chest wall mechanics and ventilatory insufficiency. The ability of a lung injury scoring system to predict the degree of respiratory dysfunction after rib fractures was evaluated. 相似文献76.
77.
Prediction of choledocholithiasis using a pocket microcomputer 总被引:4,自引:0,他引:4
T V Taylor C P Armstrong S Rimmer S B Lucas J Jeacock A A Gunn 《The British journal of surgery》1988,75(2):138-140
A computerized method, using a small pocket computer, has been used to predict the presence of choledocholithiasis in a prospective series of 239 patients undergoing cholecystectomy. From an initial data base of 424 patients 36 factors were evaluated and the most important 2 of these were determined by multivariate analysis for use in the prospective analysis. Satisfactory operative cholangiograms were a prerequisite to evaluation of the statistical method and were obtained in 90.4 per cent of cases. Using the computerized method a common bile duct stone would have been overlooked in only 1 patient but 17 unnecessary explorations would have been carried out. The overall accuracy of the computerized method was 92.5 per cent. When the method was applied to a further study of 97 patients from a separate centre the overall accuracy was 85.6 per cent. If the method was used to aid selective use of operative cholangiography, cholangiograms would be performed in 20 per cent and stones would be overlooked in less than 1 per cent. 相似文献
78.
Neil Andersson 《AIDS research and therapy》2006,3(1):23-3
With the exception of post-exposure prophylaxis for reported rape, no preventive strategy addresses the choice disabled –
those who might like to benefit from AIDS prevention but who are unable to do so because they do not have the power to make
and to act on prevention decisions. In southern African countries, where one in every three has been forced to have sex by
the age of 18 years, a very large proportion of the population is choice disabled. This group is at higher risk of HIV infection
and unable to respond to AIDS prevention programmes; they represent a reservoir of infection. Reduction of sexual violence
would probably decrease HIV transmission directly, but also indirectly as more people can respond to existing AIDS prevention
programmes. 相似文献
79.
Jonas T. Johnson MD Editor John K. Niparko MD Editor-in-Chief Paul A. Levine MD Editor David W. Kennedy MD Editor Pete Weber MD Editor-in-Chief Randal S. Weber MD Editor Michael S. Benninger MD Past Editor in Chief Richard M. Rosenfeld MD MPH Editor in Chief Robert J. Ruben MD Editor in Chief Richard J.H. Smith MD Editor in Chief Robert Thayer Sataloff MD DMA Editor in Chief Neil Weir MA FRCS Editor Emeritus 《Otolaryngology--head and neck surgery》2006,135(6):829-830
80.