全文获取类型
收费全文 | 14472篇 |
免费 | 723篇 |
国内免费 | 94篇 |
专业分类
耳鼻咽喉 | 188篇 |
儿科学 | 258篇 |
妇产科学 | 261篇 |
基础医学 | 1723篇 |
口腔科学 | 728篇 |
临床医学 | 1192篇 |
内科学 | 3573篇 |
皮肤病学 | 255篇 |
神经病学 | 1207篇 |
特种医学 | 344篇 |
外科学 | 2315篇 |
综合类 | 75篇 |
一般理论 | 7篇 |
预防医学 | 925篇 |
眼科学 | 287篇 |
药学 | 847篇 |
中国医学 | 50篇 |
肿瘤学 | 1054篇 |
出版年
2024年 | 16篇 |
2023年 | 154篇 |
2022年 | 330篇 |
2021年 | 588篇 |
2020年 | 325篇 |
2019年 | 423篇 |
2018年 | 500篇 |
2017年 | 368篇 |
2016年 | 383篇 |
2015年 | 440篇 |
2014年 | 626篇 |
2013年 | 794篇 |
2012年 | 1275篇 |
2011年 | 1244篇 |
2010年 | 691篇 |
2009年 | 621篇 |
2008年 | 991篇 |
2007年 | 961篇 |
2006年 | 895篇 |
2005年 | 822篇 |
2004年 | 703篇 |
2003年 | 606篇 |
2002年 | 581篇 |
2001年 | 75篇 |
2000年 | 62篇 |
1999年 | 77篇 |
1998年 | 111篇 |
1997年 | 74篇 |
1996年 | 70篇 |
1995年 | 58篇 |
1994年 | 49篇 |
1993年 | 43篇 |
1992年 | 32篇 |
1991年 | 27篇 |
1990年 | 15篇 |
1989年 | 15篇 |
1988年 | 12篇 |
1987年 | 19篇 |
1986年 | 27篇 |
1985年 | 20篇 |
1984年 | 19篇 |
1983年 | 9篇 |
1982年 | 9篇 |
1981年 | 17篇 |
1980年 | 18篇 |
1979年 | 12篇 |
1977年 | 10篇 |
1975年 | 11篇 |
1974年 | 10篇 |
1969年 | 6篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
41.
42.
43.
Takeshi Shinkawa Masaaki Yamagishi Keisuke Shuntoh Takako Miyazaki Takahiro Hisaoka Tomoya Inoue Hitoshi Yaku 《The Japanese Journal of Thoracic and Cardiovascular Surgery》2006,54(11):469-471
Objective We have developed a surgical method for atrial septal defect repair through a limited right lateral thoracotomy in which the
incision line begins 2 cm caudal from the lower angle of the scapula and ends at the midaxial line, thereby improving patient
satisfaction with the cosmetic results of treatment.
Methods We performed a retrospective review of 28 patients who underwent isolated atrial septal defect repair through a limited right
lateral thoracotomy between January 2002 and August 2004. The mean age and mean body weight at the time of the operation were
85.8 months (range 9–236 months) and 23.0 kg (range 8.0–56.0 kg), respectively. All repaired defects were the ostium secundum
type.
Results There was no operative or late mortality and no late morbidity after a mean follow-up of 26 months (range 12–41 months). Echocardiography
showed no residual shunt in any of the patients. The mean length of the skin incision was 7.8 cm (range 5.0–11.0 cm), and
almost all the patients had satisfactory cosmetic results.
Conclusion The atrial septal defect repair through a limited right lateral thoracotomy in pediatric patients showed satisfactory surgical
results and excellent cosmetic results. 相似文献
44.
This study aimed to identify risk factors for type 2 diabetes (T2D) in Korea, a rapidly changing country. Data of 5,132 adults aged 20-85 were used from the 2001 Korean Health and Nutrition Examination Survey. Multiple logistic regression was carried out to identify risk factors for T2D. Three models were specified: (i) socioeconomic and demographic factors (model 1: age, gender, education, poverty income ratio, employment), (ii) behavioral risk factors and covariates (model 2: obesity, physical activity, smoking, alcohol drinking, dietary quality, family history of T2D, co-morbidity) and (iii) socioeconomic, demographic, and behavioral factors (model 3). The prevalence of T2D was 7.4%. Less education (OR 1.41, 95% CI 1.08-1.84), age (OR 2.19, 95% CI 1.56-3.08 in 40-59 yrs, OR 4.05, 95% CI 2.76-5.95 in 60 yrs + comparing to 20-39 yrs) and abdominal obesity (OR 2.24, 95% CI 1.79-2.82) were risk factors for T2D even after controlling for other factors simultaneously. There was a significant association of T2D with ever smoking (OR 1.34, 95% CI 1.06-1.67). The relationship of age with T2D was modified by gender in model 1 and the relationship of smoking with T2D was modified by obesity in model 2. Less educated, older, obese or ever smokers were more likely to have T2D. Gender mediated the relationship of age, and obesity mediated the relationship of smoking, with T2D. Intervention programs for T2D in Korea should take the interactions among risk factors into account. 相似文献
45.
Alfredo Avellaneda Fernández álvaro Pérez Martín Maravillas Izquierdo Martínez Mar Arruti Bustillo Francisco Javier Barbado Hernández Javier de la Cruz Labrado Rafael Díaz-Delgado Pe?as Eduardo Gutiérrez Rivas Cecilia Palacín Delgado José Ramón Ramón Giménez Javier Rivera Redondo 《Atencion primaria / Sociedad Espa?ola de Medicina de Familia y Comunitaria》2009,41(10):e1-e5
46.
Edmo Atique Gabriel Rafael Fagionato Locali Carla Cristina Romano Alberto José da Silva Duarte José Honório Palma Enio Buffolo 《European journal of cardio-thoracic surgery》2007,31(3):406-412
OBJECTIVE: The objective of this study is to evaluate the inflammatory response caused by endovascular stents in the treatment of aortic aneurysms. METHODS: Twenty-five patients underwent endovascular stent treatment from March through December 2005. The evolution of mediators (sedimentation velocity, C reactive protein, interleukin-6, interleukin-8, tumor necrosis factor-alpha, intercellular adhesion molecule-1, l-selectin), inflammatory cells (leukocytes, lymphocytes, platelets), serum creatinine and body temperature within preoperative period and in the following postoperative periods--1, 6, 24 and 48 h, 7 days, 1-3 months, was analyzed. In order to achieve statistic significance, Friedman test and Wilcoxon test were used, with index of significance of 5% (p<0.05). RESULTS: Peak values of sedimentation velocity, C reactive protein and interleukin-6 were observed at 7 days (p<0.0001), 48 h (p<0.0001) and 24h (p<0.0001), respectively. Tumor necrosis factor-alpha and interleukin-8 did not show statistically significant variability during the entire follow-up. In terms of intercellular adhesion molecule-1 and l-selectin, their expressive values were found in late phase of follow-up, although without statistical significance. Elevation of leukocytes count occurred in premature phase of follow-up (p<0.0001), while lymphocyte and platelet count occurred in a late phase of follow-up (p<0.0001). Serum levels of creatinine did not show significant variability during follow-up. The period between 24 and 48 h corresponded to major frequency for fever (p<0.0001). CONCLUSION: Individual mediators analysis and inflammatory cells demonstrated variability of their values during postoperative follow-up. This could help in the analysis of the inflammatory response evolution caused by endovascular stent treatment for aortic aneurysms in premature and late phases after implantation of the vascular prosthesis. 相似文献
47.
48.
Beatriz Lara Cristian de la Roza Sara Vil�� Rafael Vidal Marc Miravitlles 《INT J CHRONIC OBSTR》2007,2(3):393-398
The Spanish registry of alpha-1 antitrypsin deficiency was founded in 1993 and became a member of the International Registry (AIR) in 1999. We describe the updating process following its incorporation into AIR and compare the data collected in the first period (1993–1999) and the second period (1999–2005), during which time patients were included exclusively by internet.The registry included 301 patients during period 1, 69% males and 46% had a history of smoking. Their mean age was 46 years (SD = 13) and 284 (94%) had the ZZ phenotype, 49% received augmentation therapy. During period 2, 161 new cases were included, 63% of whom were males with a mean age of 44 years (SD = 16). A total of 126 (78%) had the ZZ phenotype. Only 12% received augmentation therapy. A total of 462 different patients were included in both periods. Significant differences were observed in the number of cases with the SZ phenotype and the severity of FEV1 impairment between the two periods.Implementation of an internet-based collection of data did not result in a lower rate of reporting to the registry. However, data from a significant number of patient included in period 1 could not be actualized in the new data base. 相似文献
49.
Martín-García Rafael F. MD Janer Alexander Lugo MD Rullán Francisco Viejo MSIV † 《Dermatologic surgery》2005,31(6):670-673
BACKGROUND: Although cyanoacrylate tissue adhesives are frequently used in the closure of cutaneous lacerations and excisions, only a few reports comment on their usefulness as a dressing over sutured wounds. A new formulation of octyl-2-cyanoacrylate (Liquid Bandage; BAND-AID, Johnson & Johnson) is used as an occlusive protective film over minor cuts and scrapes. OBJECTIVE: An uncontrolled pilot study to assess the safety, efficacy, and cost of Liquid Bandage as an occlusive dressing over sutured facial excisions. METHODS: Patients undergoing excision of facial neoplasms were recruited. After conventional layered repair, Liquid Bandage was applied. On suture removal, the wounds were photographed and evaluated by three dermatologists, who assigned an overall outcome rating. The average cost of Liquid Bandage and routine wound care materials was calculated based on prices from three different pharmacies. RESULTS: Of the 18 wounds available at follow-up, 17 were assigned an overall outcome rating of good or excellent by at least one of the evaluators. Eleven wounds received an excellent rating from at least two of the evaluators. One case of distal flap necrosis occurred. Liquid Bandage proved to be less expensive than routine postsurgical wound care materials. CONCLUSIONS: Liquid Bandage dressing is safe and effective over sutured facial excisions. 相似文献
50.
Mònica Gratacòs Juan R González Josep M Mercader Rafael de Cid Mikel Urretavizcaya Xavier Estivill 《Neuropsychopharmacology》2007,61(7):911-922
BACKGROUND: There is an increasing recognition that the pathophysiology of mental disorders could be the result of deregulation of synaptic plasticity with alterations of neurotrophins. The valine (Val)66-to-methionine (Met) variant, located in the pro brain-derived neurotrophic factor (BDNF) sequence, has been extensively studied through linkage and association approaches in several psychiatric disorders. METHODS: We performed a meta-analysis restricted to individual case-control studies in different categories of mental disorders and BDNF Val66Met polymorphism. We included data from 39 case-control studies encompassing psychiatric phenotypes: eating disorders, substance-related disorders, mood disorders, and schizophrenia, among others. RESULTS: The association of Val66Met was confined to three diagnoses: substance-related disorders, eating disorders, and schizophrenia. The Val/Met and the Met/Met genotypes increase the risk for eating disorders up to 33%, while these same genotypes confer a 21% protective effect in substance-related disorders. The homozygous carriers Met/Met showed a 19% increased risk of schizophrenia with respect to the heterozygous state. CONCLUSIONS: The study confirms the association of Val66Met to substance-related disorders, eating disorders, and schizophrenia. It remains to be determined if other variants in tight linkage disequilibrium with Val66Met could configure an extended functional haplotype that would explain observed discrepancies in risk estimations across studies. 相似文献