全文获取类型
收费全文 | 59983篇 |
免费 | 8219篇 |
国内免费 | 226篇 |
专业分类
耳鼻咽喉 | 577篇 |
儿科学 | 1523篇 |
妇产科学 | 2330篇 |
基础医学 | 5796篇 |
口腔科学 | 917篇 |
临床医学 | 19295篇 |
内科学 | 9997篇 |
皮肤病学 | 568篇 |
神经病学 | 4913篇 |
特种医学 | 1530篇 |
外国民族医学 | 4篇 |
外科学 | 6235篇 |
综合类 | 756篇 |
一般理论 | 28篇 |
预防医学 | 5814篇 |
眼科学 | 1455篇 |
药学 | 3360篇 |
中国医学 | 69篇 |
肿瘤学 | 3261篇 |
出版年
2023年 | 935篇 |
2022年 | 384篇 |
2021年 | 871篇 |
2020年 | 1031篇 |
2019年 | 857篇 |
2018年 | 1832篇 |
2017年 | 1921篇 |
2016年 | 2033篇 |
2015年 | 2212篇 |
2014年 | 2618篇 |
2013年 | 3416篇 |
2012年 | 2907篇 |
2011年 | 3322篇 |
2010年 | 2383篇 |
2009年 | 2587篇 |
2008年 | 2972篇 |
2007年 | 3142篇 |
2006年 | 3067篇 |
2005年 | 3038篇 |
2004年 | 2915篇 |
2003年 | 2598篇 |
2002年 | 2530篇 |
2001年 | 1143篇 |
2000年 | 945篇 |
1999年 | 1146篇 |
1998年 | 1141篇 |
1997年 | 1156篇 |
1996年 | 1061篇 |
1995年 | 994篇 |
1994年 | 725篇 |
1993年 | 664篇 |
1992年 | 718篇 |
1991年 | 685篇 |
1990年 | 667篇 |
1989年 | 610篇 |
1988年 | 512篇 |
1987年 | 506篇 |
1986年 | 519篇 |
1985年 | 515篇 |
1984年 | 444篇 |
1983年 | 387篇 |
1982年 | 410篇 |
1981年 | 401篇 |
1980年 | 334篇 |
1979年 | 371篇 |
1978年 | 302篇 |
1977年 | 293篇 |
1976年 | 267篇 |
1975年 | 201篇 |
1972年 | 217篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
AIMS: To establish all-cause and cause-specific death rates, and risk factors for mortality in insulin-treated diabetic individuals living in the province of Canterbury, New Zealand. METHODS: Insulin-treated diabetic subjects (n = 995) on the Canterbury Diabetes Registry were followed up over 15 years and vital status determined. Death rates were standardized and hazard regression was used to model the effects of demographic covariates on relative survival time. RESULTS: There were 419 deaths in 11 226.3 person-years of follow-up with a standardized mortality ratio (SMR) of 2.0 (95% confidence interval (CI) 1.8-2.2). Relative mortality was greatest for the group aged 0-29 years (SMR 3.0 (95% CI 2.4-3.7)). After controlling for diabetes duration and gender, a 10-year increment in age of onset was associated with a 33% decrease in relative hazard (95% CI 29-36%), indicating that excess mortality due to diabetes declines with rising age of onset. After controlling for age of onset and gender, each 10-year increment in duration of diabetes is associated with a 26% decrease in relative hazard (95% CI 24-29%), indicating that with longer survival the mortality hazard approaches the general population hazard. Relative mortalities were increased for cardiovascular, renal and respiratory disease, but not malignancy. Relative mortality from acute metabolic complications was increased in the subgroup with age of onset of diabetes < 30 years and requiring insulin within 1 year of diagnosis. CONCLUSIONS: Mortality rates are high for insulin-treated diabetic individuals relative to the general population. 相似文献
72.
73.
74.
Elhaji Youssef A.; Stoica Ileana; Dennis Sheldon; Purisima Enrico O.; Lumbroso Rose; Beitel Lenore K.; Trifiro Mark A. 《Human molecular genetics》2006,15(9):1561
Human Molecular Genetics (2006) 15, 921931; 相似文献
75.
76.
77.
Predictors of clustering of tuberculosis in Greater Vancouver: a molecular epidemiologic study 总被引:3,自引:0,他引:3 下载免费PDF全文
78.
Eija Heikkinen MNSc RN Merja Nikkonen PhD RN & Helena Aavarinne PhD RN 《Journal of advanced nursing》1998,27(5):1069-1075
The definition of envy is commonly based on psychoanalytical views of organizational culture. The purpose of this paper is to describe envy in a nursing community. The population study consisted of random sample of 120 subjects drawn from among the employees of one central hospital in Finland. The study material consisted of data collected by questionnaires (response rate 65%). The data were processed by various statistical methods. Open-ended questions were analysed by inductive content analysis. The results of this study indicated that the employee's view of his/her official position in the nursing community, his/her relationships with his/her fellow workers and the management as well as relationships with other nursing communities are all related to envy. The employee's view of his/her official position intensified his/her feelings of envy, if he/she had other negative feelings, anxiety, dissatisfaction with him/herself, and negative feelings towards fellow workers. The major object of envy was fellow workers' salaries. Envy towards other nursing communities was generated by alleged differences in the amount of labour, or by the charge nurse's greater interest in other sections. Employees coped with envy by hiding these feelings and being modest. Women coped with envy by being silent, while men denied the value of the object of envy. 相似文献
79.
80.
David A. Hughes Graham C. Smith Joyce E. Davidson Anna V. Murphy T. James Beattie 《Pediatric nephrology (Berlin, Germany)》1996,10(4):445-447
. Neutrophil-mediated tissue damage has been implicated in the pathogenesis of diarrhoea-associated haemolytic uraemic syndrome
(D+ HUS). This study evaluates priming and activation of the neutrophil oxidative burst in D+ HUS using chemiluminescent techniques.
Peripheral blood neutrophils from 11 children with acute D+ HUS were examined. No difference was found in the oxidative burst
of neutrophils from patients and controls. Serum elastase levels were measured in 8 patients and found to be significantly
elevated. Although elastase results suggest neutrophil activation, chemiluminescence studies do not confirm this in the peripheral
blood neutrophil. This does not support a significant role for circulating agents in priming and activating the peripheral
blood neutrophil.
Received August 17, 1995; received in revised form and accepted November 27, 1995 相似文献