全文获取类型
收费全文 | 800篇 |
免费 | 55篇 |
国内免费 | 63篇 |
专业分类
耳鼻咽喉 | 36篇 |
儿科学 | 48篇 |
妇产科学 | 9篇 |
基础医学 | 93篇 |
口腔科学 | 28篇 |
临床医学 | 108篇 |
内科学 | 184篇 |
皮肤病学 | 20篇 |
神经病学 | 21篇 |
特种医学 | 97篇 |
外科学 | 76篇 |
综合类 | 38篇 |
预防医学 | 53篇 |
眼科学 | 4篇 |
药学 | 55篇 |
中国医学 | 2篇 |
肿瘤学 | 46篇 |
出版年
2022年 | 10篇 |
2021年 | 19篇 |
2020年 | 8篇 |
2019年 | 19篇 |
2018年 | 24篇 |
2017年 | 15篇 |
2016年 | 18篇 |
2015年 | 22篇 |
2014年 | 30篇 |
2013年 | 40篇 |
2012年 | 18篇 |
2011年 | 26篇 |
2010年 | 33篇 |
2009年 | 38篇 |
2008年 | 34篇 |
2007年 | 65篇 |
2006年 | 35篇 |
2005年 | 26篇 |
2004年 | 18篇 |
2003年 | 14篇 |
2002年 | 14篇 |
2001年 | 12篇 |
2000年 | 6篇 |
1999年 | 17篇 |
1998年 | 36篇 |
1997年 | 37篇 |
1996年 | 24篇 |
1995年 | 24篇 |
1994年 | 30篇 |
1993年 | 20篇 |
1992年 | 5篇 |
1991年 | 12篇 |
1990年 | 3篇 |
1989年 | 19篇 |
1988年 | 24篇 |
1987年 | 14篇 |
1986年 | 4篇 |
1985年 | 10篇 |
1984年 | 7篇 |
1983年 | 4篇 |
1982年 | 10篇 |
1981年 | 12篇 |
1980年 | 8篇 |
1978年 | 7篇 |
1977年 | 8篇 |
1976年 | 13篇 |
1975年 | 5篇 |
1970年 | 3篇 |
1967年 | 3篇 |
1966年 | 3篇 |
排序方式: 共有918条查询结果,搜索用时 0 毫秒
41.
42.
Hypertension and headache 总被引:2,自引:0,他引:2
43.
44.
We present a simple method for preparing an ear wick for treating otitis externa in ENT outpatient clinics. In our experience, this method is efficient, economical and clean, and ensures an equal distribution of the medication along the wick. 相似文献
45.
46.
Kalach N Badran AM Jaffray P Campeotto F Benhamou PH Dupont C 《The Turkish journal of pediatrics》2003,45(1):6-10
The purpose of our study was to systematically evaluate gastric acid output in children with long-lasting gastro-esophageal reflux (GER) in order to assess its mechanism and the need for anti-acid treatment. The investigation was carried out in 20 males and 10 females, aged 7.5 +/- 3.8 years, with prolonged (>15 months) clinical manifestations of GER. All underwent routine ambulatory 24-h esophageal pH-monitoring and measurement of gastric acid secretion including gastric basal (BAO) (micromol/kg/h), maximal (MAO) and peak acid outputs (PAO) after pentagastrin (6 microg/kg sec) stimulation. Children with heartburn or abdominal pain underwent upper fiber-endoscopy. In group A (moderate GER, n=12), patients had a normal reflux index (pH<4 below 5.2% of total recording time) despite abnormal Euler and Byrne scoring (median 57, 95% confidence interval 53.5-73.4). In group B (severe GER, n=18, among whom 5 were with grade III esophagitis), reflux index was >5.2%. When considering all children, esophageal pH (%) was significantly correlated with MAO and PAO, r=0.33, p=0.05 and r=0.37, p=0.04, respectively. Children of group B exhibited significantly higher BAO (75, 53.96-137.81), MAO (468, 394.1-671.3) and PAO (617, 518.8-782.3) than those of group A, BAO (27, 10.8-38.5), MAO (266, 243.2-348.2) and PAO (387, 322.5-452.7), p<0.05). The five children of group B with severe esophagitis exhibited significantly higher BAO, MAO and PAO than the other 13 children from the same group and those of group A, p<0.05. Children with long-lasting and severe GER hyper-secrete gastric acid. Individual variations in gastric acid secretion probably account for variations in gastric acid inhibitor requirements. Anti-secretory treatment is justified in children with long-lasting GER and high pH-metric reflux index. 相似文献
47.
48.
1 病例报告 男,7岁.因双下肢不等长,右膝及右踝关节骨性肿大就诊.无明显外伤史,亦无红、肿、热、痛病史.查体:发育正常,营养良好.双下肢不等长,左60cm,右64cm,有跛行.右膝及右踝内侧肿大,肤色正常,关节活动无异常.X线:右侧半身诸关节(肩、肘、腕、髋、膝、踝)骨骺及干骺发育均较左侧增大,肢体较长,骨骺出现亦较对侧提早.如右尺骨茎突骨骺较左侧提早出现(图1).右肘关节肱骨小头骨骺较左侧增大(图2).右髋臼发育浅平,边缘毛糙,右股骨头骨骺较左侧明显增大,其距泪滴之距离较左侧大1.0cm,呈… 相似文献
49.
AA Badran HA Vohra SA Livesey 《Annals of the Royal College of Surgeons of England》2012,94(6):416-421
INTRODUCTION
Severe symptomatic aortic stenosis is associated with a poor prognosis, with most patients dying 2–3 years after diagnosis. We analysed the proportion of patients with severe aortic stenosis not referred for aortic valve replacement (AVR) in a UK-based population and the clinical factors contributing to this.METHODS
Retrospective analysis of patients with echocardiographic evidence of severe aortic stenosis was performed at a university teaching hospital.RESULTS
A total of 178 consecutive patients with severe aortic stenosis (AVA: <1cm2, mean pressure gradient: ≥40mmHg, or visually severe on echocardiography) were included in the study. Eighty-three patients did not have AVR (95% confidence interval: 39–54%). The cohort included 146 symptomatic patients (82%) and 32 (18%) who were asymptomatic. The most common reason for non-referral in symptomatic patients was ‘high operative risk’ and in asymptomatic patients ‘no symptoms’. Of the patients who did not have AVR, only 19% (n=16) were referred for a surgical opinion. None of the patients in the asymptomatic group underwent echocardiographic stress imaging. The thirty-day operative mortality rate in the AVR group was 2.3%. Symptomatic patients who underwent AVR had superior survival, even after adjusting for co-morbidities (p<0.001).CONCLUSIONS
A considerable proportion of patients with severe aortic stenosis are not referred for surgery although they have a clear indication for AVR. Patients are often estimated as being too high risk or having prohibitive co-morbidities. Among asymptomatic patients, stress imaging was rarely used despite its useful role prognostically and in deciding the best time for intervention. 相似文献50.
Arianne C Lim Kitty WM Bloemenkamp Kees Boer Johannes J Duvekot Jan Jaap HM Erwich Tom HM Hasaart Pieter Hummel Ben WJ Mol Jos PM Offermans Charlotte M van Oirschot Job G Santema Hubertina CJ Scheepers Willem A Schöls Frank PHA Vandenbussche Maurice GAJ Wouters Hein W Bruinse 《BMC pregnancy and childbirth》2007,7(1):1-6