全文获取类型
收费全文 | 110605篇 |
免费 | 8921篇 |
国内免费 | 1876篇 |
专业分类
耳鼻咽喉 | 433篇 |
儿科学 | 2880篇 |
妇产科学 | 1287篇 |
基础医学 | 7400篇 |
口腔科学 | 1429篇 |
临床医学 | 14147篇 |
内科学 | 11540篇 |
皮肤病学 | 1116篇 |
神经病学 | 1752篇 |
特种医学 | 1810篇 |
外国民族医学 | 1篇 |
外科学 | 8586篇 |
综合类 | 22216篇 |
现状与发展 | 10篇 |
一般理论 | 39篇 |
预防医学 | 33342篇 |
眼科学 | 602篇 |
药学 | 7311篇 |
354篇 | |
中国医学 | 3309篇 |
肿瘤学 | 1838篇 |
出版年
2024年 | 315篇 |
2023年 | 1810篇 |
2022年 | 3495篇 |
2021年 | 4701篇 |
2020年 | 5315篇 |
2019年 | 3685篇 |
2018年 | 3512篇 |
2017年 | 3527篇 |
2016年 | 3680篇 |
2015年 | 3829篇 |
2014年 | 8211篇 |
2013年 | 8703篇 |
2012年 | 8056篇 |
2011年 | 8310篇 |
2010年 | 6433篇 |
2009年 | 5615篇 |
2008年 | 5884篇 |
2007年 | 5614篇 |
2006年 | 5073篇 |
2005年 | 4146篇 |
2004年 | 3437篇 |
2003年 | 2906篇 |
2002年 | 2058篇 |
2001年 | 1855篇 |
2000年 | 1491篇 |
1999年 | 1229篇 |
1998年 | 1014篇 |
1997年 | 942篇 |
1996年 | 823篇 |
1995年 | 756篇 |
1994年 | 635篇 |
1993年 | 493篇 |
1992年 | 443篇 |
1991年 | 480篇 |
1990年 | 367篇 |
1989年 | 334篇 |
1988年 | 287篇 |
1987年 | 237篇 |
1986年 | 222篇 |
1985年 | 256篇 |
1984年 | 191篇 |
1983年 | 156篇 |
1982年 | 170篇 |
1981年 | 131篇 |
1980年 | 119篇 |
1979年 | 84篇 |
1978年 | 82篇 |
1977年 | 84篇 |
1976年 | 97篇 |
1975年 | 52篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
102.
颅内肿瘤切除术后颅内感染危险因素分析 总被引:1,自引:0,他引:1
目的 探讨颅内肿瘤切除术后颅内感染的危险因素和预防措施。方法 回顾性分析442例颅内肿瘤切除术患者的临床资料。结果 442例颅内肿瘤切除术患者发生颅内感染33例,感染率为7.47%。非脑膜瘤手术颅内感染率为10.04%,高于脑膜瘤术后颅内感染率3.83%(P〈0.05);手术时间≥4h者颅内感染率为9.87%,高于手术时间〈4h者颅内感染率4.78%(P〈0.05);有脑脊液漏者颅内感染率为15.00%,高于无脑脊液漏者颅内感染率6.28%(P〈0.05);引流管留置≥24h者颅内感染率为11.58%,高于未留置或留置〈24h者颅内感染率5.03%(P〈0.05)。结论 手术时间≥4h、引流管留置时间≥24h、存在脑脊液漏是颅内肿瘤切除术后发生颅内感染的危险因素。 相似文献
103.
104.
Mariela Dutra Gontijo Moura Soraya de Mattos Camargo Grossmann Linaena Méricy da Silva Fonseca Maria Inês Barreiros Senna Ricardo Alves Mesquita 《Journal of oral pathology & medicine》2006,35(6):321-326
BACKGROUND: Oral hairy leukoplakia (OHL) may be an indicator of the progression of Human Immunodeficiency Virus (HIV)-induced immuno-depression, and the evaluation of risk factors leading to OHL is important in the management of these HIV-infected patients. However, there are few studies that analyze risk factors leading to OHL in the Brazilian population. The aim of this case-control study is to present data about prevalence rates and risk factors leading to OHL in a sample of HIV-infected adults in Brazil. METHODS: This case-control study included 111 HIV-infected patients treated at a clinic for sexually transmitted diseases and HIV. In the initial examinations with dentists, variables were collected from all patients. Diagnosis of OHL was performed in accordance with the International Classification System and cytological features. The Fisher and the chi-squared tests were used for statistical analysis. The proportional prevalence and odds ratio were estimated. RESULTS: Outcome presented a positive, statistically significant association among the presence of OHL and viral load of 3000 copies/mul or greater (P = 0.0001; odds ratio (OR) = 5.8), presence of oral candidiasis (P = 0.0000; OR = 11.1), previous use of fluconazole (P = 0.0000; OR = 24.6), and use of systemic acyclovir (P = 0.032; OR = 4.3). Antiretroviral medication presented a negative, statistically significant association with the presence of OHL (P = 0.002; OR = 8.4). CONCLUSIONS: Prevalence of OHL was 28.8%. Viral load, oral candidiasis, previous use of fluconazole, and systemic acyclovir were determined to be risk factors for OHL. Antiretroviral medication proved to be protective against the development of OHL. 相似文献
105.
Eimear Kieran 《Current Obstetrics & Gynaecology》2006,16(4):218-225
106.
107.
108.
109.
Teaching psychiatric ethics 总被引:1,自引:0,他引:1
S Bloch 《Medical education》1988,22(6):550-553
In the last decade, we have witnessed a burgeoning of interest in ethical issues amongst psychiatrists. Teaching of the subject, however, remains at a rudimentary stage. Various approaches to such instruction are available, particularly modelling (students observe their experienced counterpart), the case method (examining specific clinical situations which involve a need for ethical decision-making), and the seminar approach (trainees are exposed to a core body of knowledge, mainly theoretical in nature). Faced with these different teaching models, the University of Oxford Department of Psychiatry has opted for a blend of all three approaches, which incorporates two goals: an increase in the trainees' sensitivity to the many intricate moral dilemmas facing the psychiatric profession; and their familiarity with salient concepts in moral philosophy which constitute a basis for ethical reasoning and which have a bearing on clinical practice. The teaching programme comprises the following: a pair of trainees prepares a presentation on an aspect of psychiatric ethics under the supervision of a senior psychiatrist. A moral philosopher assumes the role of discussant of the ethical problems raised by the trainees; this is followed by a general discussion. Topics have included involuntary hospitalization, dual loyalty, suicide, psychiatric diagnosis, and ethical issues in various spheres of psychiatric practice such as sex therapy, psychotherapy and child psychiatry. The approach has worked effectively and proved rewarding to all participants involved. 相似文献
110.
Regulations evolve and risks management becomes one of the biomedical engineers' preoccupations. Thus, risks are various, and consequently it is difficult to identify, to manage and to bring them under control. Furthermore, regulations exist for sectors like healthcare technology monitoring, but it is not the same thing for instance for the risks linked to the maintenance. Thus regulation in the sector of maintenance evolves and the decree of the 1st July law of health safety is going to modify the biomedical environment. The goal of this work is to study the tools and the methods of risks management that have been used for several years in the industrial field and to use them for some biomedical equipment like monitors or IV pumps. These methods adapted to these equipment will allow us to determine some appropriate rules of maintenance. 相似文献