全文获取类型
收费全文 | 1956576篇 |
免费 | 141625篇 |
国内免费 | 2958篇 |
专业分类
耳鼻咽喉 | 25245篇 |
儿科学 | 65185篇 |
妇产科学 | 53097篇 |
基础医学 | 270773篇 |
口腔科学 | 53306篇 |
临床医学 | 167795篇 |
内科学 | 385272篇 |
皮肤病学 | 40070篇 |
神经病学 | 162571篇 |
特种医学 | 78417篇 |
外国民族医学 | 558篇 |
外科学 | 293987篇 |
综合类 | 42722篇 |
现状与发展 | 3篇 |
一般理论 | 598篇 |
预防医学 | 157187篇 |
眼科学 | 42981篇 |
药学 | 143678篇 |
3篇 | |
中国医学 | 4172篇 |
肿瘤学 | 113539篇 |
出版年
2018年 | 40808篇 |
2017年 | 31282篇 |
2016年 | 34450篇 |
2015年 | 20568篇 |
2014年 | 26347篇 |
2013年 | 40018篇 |
2012年 | 62881篇 |
2011年 | 77515篇 |
2010年 | 50049篇 |
2009年 | 40818篇 |
2008年 | 72425篇 |
2007年 | 77407篇 |
2006年 | 58299篇 |
2005年 | 58389篇 |
2004年 | 58113篇 |
2003年 | 56034篇 |
2002年 | 52871篇 |
2001年 | 80346篇 |
2000年 | 83289篇 |
1999年 | 70623篇 |
1998年 | 18632篇 |
1997年 | 17108篇 |
1996年 | 16950篇 |
1995年 | 16639篇 |
1994年 | 15606篇 |
1993年 | 14679篇 |
1992年 | 57792篇 |
1991年 | 56033篇 |
1990年 | 54722篇 |
1989年 | 52785篇 |
1988年 | 49126篇 |
1987年 | 48288篇 |
1986年 | 45924篇 |
1985年 | 44328篇 |
1984年 | 33132篇 |
1983年 | 28532篇 |
1982年 | 16696篇 |
1981年 | 14871篇 |
1979年 | 31402篇 |
1978年 | 21749篇 |
1977年 | 18388篇 |
1976年 | 17196篇 |
1975年 | 18209篇 |
1974年 | 22302篇 |
1973年 | 21455篇 |
1972年 | 19604篇 |
1971年 | 18492篇 |
1970年 | 16988篇 |
1969年 | 15983篇 |
1968年 | 14608篇 |
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
91.
N Jastrow E Antonelli R Robyr O Irion M Boulvain 《Ultrasound in obstetrics & gynecology》2006,27(4):420-424
OBJECTIVE: To evaluate the reproducibility of sonographic measurement of the lower uterine segment in pregnant women at term. METHODS: Two independent observers performed transabdominal sonography on 129 women between 36 and 38 weeks of gestation who had had a previous Cesarean section. Sonography was performed when the patients had a full and a half-full bladder; in 100 patients, the measurements were also performed transvaginally, with the patients having an empty bladder. Agreement was quantified by the intraclass correlation coefficient and, using a cut-off of 3.5 mm, by the kappa coefficient. RESULTS: The intraobserver agreement was generally high (intraclass correlation coefficient > 0.90). The interobserver agreement was higher on transvaginal (intraclass correlation coefficient, 0.94) compared with transabdominal (0.70 and 0.84, with full and half-full bladder, respectively) ultrasound. The kappa coefficient was 0.75 transvaginally, compared with 0.34 and 0.54 using the transabdominal approach, with full and half-full bladder, respectively. CONCLUSION: The agreement between two observers for sonographic transvaginal measurement of the lower uterine segment can be considered good, compared with poor to moderate agreement using the transabdominal approach. 相似文献
92.
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
93.
Social phobia, fear of negative evaluation and harm avoidance. 总被引:1,自引:0,他引:1
M Faytout J Tignol J Swendsen D Grabot B Aouizerate J P Lépine 《European psychiatry》2007,22(2):75-79
This naturalistic, prospective investigation examined the role of fear of negative evaluation and the personality trait of harm avoidance in the anxiety levels of treated social phobia patients. One hundred and fifty-seven patients with DSM-IV social phobia were assessed before starting treatment and were then followed for up to two years. As expected, greater fear of negative evaluation and higher scores of harm avoidance were associated with greater anxiety at the 6 month follow-up, and harm avoidance remained a significant predictor at 24 months. However, no evidence was found for an interaction between the personality and cognitive variables examined. The findings are discussed in terms of the relative independence of these factors, as well as their potential implications for the treatment of this disorder. 相似文献
94.
D Gröne† R Treudler† EM de Villiers‡ R Husak† CE Orfanos† ChC Zouboulis†§ 《Journal of the European Academy of Dermatology and Venereology》2006,20(2):202-205
Cidofovir is an acyclic nucleoside phosphonate with broad-spectrum activity against DNA viruses, including human papilloma virus (HPV). However, data on the efficacy of cidofovir in an immunosuppressive setting remain contradictory. We report for the first time on the promotion of the healing of recalcitrant warts in a patient with myelodysplastic syndrome with intravenous cidofovir treatment. 相似文献
95.
S Chinn S H Downs J M Anto M W Gerbase B Leynaert R de Marco C Janson D Jarvis N Künzli J Sunyer C Svanes E Zemp U Ackermann-Liebrich P Burney 《The European respiratory journal》2006,28(4):763-771
The incidence of asthma has been reported to be associated with obesity. An alternative analysis, of net change in prevalence, does not require exclusion of those with asthma at baseline. Follow-up data were obtained from 9,552 participants in the European Community Respiratory Health Survey and the Swiss cohort Study on Air Pollution and Lung Disease in Adults. Incidence of asthma was analysed by proportional hazards regression, and net changes in symptoms and asthma status by generalised estimating equations, by obesity group. Incidence and net change in ever having had asthma were greater in females than in males, and in participants who remained obese compared with those who were never obese (hazard ratio 2.00, 95% confidence interval 1.25-3.20; excess net change 2.8%, 0.4-5.3% per 10 yrs). The effect of being obese on net change in diagnosed asthma was greater in females than in males, but for net change in wheeze without a cold it was greater in males. The present results are consistent with asthma being more frequently diagnosed in females, especially obese females. These findings may help to explain the reports of a stronger association between asthma and obesity in females than in males. 相似文献
96.
97.
98.
99.
100.
Debra L. Roter Richard M. Frankel Judith A. Hall David Sluyter 《Journal of general internal medicine》2006,21(1):28-34
Relationship-centered care reflects both knowing and feeling: the knowledge that physician and patient bring from their respective domains of expertise, and the physician’s and patient’s experience, expression, and perception of emotions during the medical encounter. These processes are conveyed and reciprocated in the care process through verbal and nonverbal communication. We suggest that the emotional context of care is especially related to nonverbal communication and that emotion-related communication skills, including sending and receiving nonverbal messages and emotional self-awareness, are critical elements of high-quality care. Although nonverbal behavior has received far less study than other care processes, the current review argues that it holds significance for the therapeutic relationship and influences important outcomes including satisfaction, adherence, and clinical outcomes of care. 相似文献