全文获取类型
收费全文 | 568篇 |
免费 | 32篇 |
国内免费 | 44篇 |
专业分类
儿科学 | 9篇 |
妇产科学 | 7篇 |
基础医学 | 53篇 |
口腔科学 | 6篇 |
临床医学 | 68篇 |
内科学 | 146篇 |
皮肤病学 | 4篇 |
神经病学 | 9篇 |
特种医学 | 124篇 |
外科学 | 68篇 |
综合类 | 22篇 |
一般理论 | 1篇 |
预防医学 | 41篇 |
眼科学 | 4篇 |
药学 | 58篇 |
中国医学 | 1篇 |
肿瘤学 | 23篇 |
出版年
2023年 | 5篇 |
2021年 | 10篇 |
2019年 | 10篇 |
2018年 | 24篇 |
2017年 | 23篇 |
2016年 | 8篇 |
2015年 | 5篇 |
2014年 | 10篇 |
2013年 | 16篇 |
2012年 | 16篇 |
2011年 | 8篇 |
2010年 | 17篇 |
2009年 | 10篇 |
2008年 | 7篇 |
2007年 | 31篇 |
2006年 | 12篇 |
2005年 | 13篇 |
2004年 | 10篇 |
2003年 | 5篇 |
2002年 | 5篇 |
2001年 | 11篇 |
2000年 | 17篇 |
1999年 | 15篇 |
1998年 | 16篇 |
1997年 | 8篇 |
1996年 | 9篇 |
1995年 | 9篇 |
1994年 | 12篇 |
1993年 | 7篇 |
1992年 | 21篇 |
1991年 | 16篇 |
1990年 | 16篇 |
1989年 | 22篇 |
1988年 | 24篇 |
1987年 | 14篇 |
1986年 | 14篇 |
1985年 | 13篇 |
1984年 | 12篇 |
1982年 | 11篇 |
1981年 | 9篇 |
1980年 | 12篇 |
1978年 | 9篇 |
1977年 | 14篇 |
1976年 | 10篇 |
1975年 | 5篇 |
1973年 | 10篇 |
1972年 | 5篇 |
1971年 | 5篇 |
1970年 | 9篇 |
1967年 | 7篇 |
排序方式: 共有644条查询结果,搜索用时 0 毫秒
21.
22.
23.
24.
Chick J Lehert P Landron F;Plinius Maior Society 《Journal of psychopharmacology (Oxford, England)》2003,17(4):397-402
The study aimed to discover whether acamprosate reduces the severity of relapse for those patients undergoing abstinence-orientated treatment who are unable to abstain completely. Data on patients' alcohol consumption from 15 placebo-controlled treatment studies (n = 3309) were examined to test whether, at a given time point, patients who have taken one or more drinks since the last assessment ('relapsers', n = 1010) take alcohol on fewer days, report lower average number of drinks per day, and consume less alcohol in total with acamprosate compared to placebo. These studies had varying duration (90 days, 180 days and 360 days). There were four dates that were common to some studies (days 30, 90, 180 and 360). Among relapsers, acamprosate was significantly associated with less quantity (Q) and frequency (F) of drinking compared to placebo in each of the four follow-up periods (p < 0.001). The differences were most marked for the product Q x F (overall weekly consumption). For each period, there were fewer who were drinking an average of five or more drinks per day in the acamprosate compared to the placebo groups. Acamprosate helps reduce the severity of relapse in patients undergoing abstinence-orientated treatment. 相似文献
25.
本文研制了以四苯硼—唐松草新碱缔合物为电活性物质的变价态唐松草新碱—PVC膜电极。电极膜按电活性物质:PVC:DBP为1:8:8组成。该电极在pH 5.0~6.0,Ⅰ=0.05的NaCl—HCl溶液中Nernst响应范围为1×10-3~1×10-5mol/L。电极斜率为58.2 mV/logc。检测限为2.5×10-6mol/L。用直接电位法考察了TDH+,TDH2CF++共存时溶液pH和电极斜率S的关系。用S—pH关系,测定了25℃,Ⅰ=0.05时的Ka1值为(2.5±0.2)×10-4,用E—pH关系,测定了25℃,Ⅰ=0.05时的Ka2值为(8.1±0.9)×10-8。 相似文献
26.
Head injury in child abuse: evaluation with MR imaging 总被引:3,自引:0,他引:3
To evaluate the usefulness of magnetic resonance (MR) imaging in the diagnosis of head injury in child abuse, the authors compared the findings at head MR imaging and computed tomography (CT) in 19 abused children. Subdural hematomas (15 cases), cortical contusions (six cases), and shearing injuries (five cases) were demonstrated to particular advantage with MR imaging. CT remained superior in the detection of subarachnoid hemorrhage. MR imaging appears to be valuable in the assessment of patients with suspected intracranial injury due to child abuse. 相似文献
27.
28.
WL Craig CR Ramsay S Fielding ZH Krukowski 《Annals of the Royal College of Surgeons of England》2014,96(6):466-474
Introduction
This study describes variability of treatment for differentiated thyroid cancer among thyroid surgeons, in the context of changing patterns of thyroid surgery in the UK.Methods
Hospital Episodes Statistics on thyroid operations between 1997 and 2012 were obtained for England. A survey comprising six scenarios of varying ‘risk’ was developed. Patient/tumour information was provided, with five risk stratified or non-risk stratified treatment options. The survey was distributed to UK surgical associations. Respondent demographics were categorised and responses analysed by assigned risk stratified preference.Results
From 1997 to 2012, the Hospital Episode Statistics data indicated there was a 55% increase in the annual number of thyroidectomies with a fivefold increase in otolaryngology procedures and a tripling of cancer operations. Of the surgical association members surveyed, 264 respondents reported a thyroid surgery practice. Management varied across and within the six scenarios, and was not related consistently to the level of risk. Associations were demonstrated between overall risk stratified preference and higher volume practice (>25 thyroidectomies per year) (p=0.011), fewer years of consultant practice (p=0.017) and multidisciplinary team participation (p=0.037). Logistic regression revealed fewer years of consultant practice (odds ratio [OR]: 0.96/year in practice, 95% confidence interval [CI]: 0.922–0.997, p=0.036) and caseload of >25/year (OR 1.92, 95% CI: 1.044–3.522, p=0.036) as independent predictors of risk stratified preference.Conclusions
There is a substantial contribution to thyroid surgery in the UK by otolaryngology surgeons. Adjusting management according to established case-based risk stratification is not widely applied. Higher caseload was associated with a preference for management tailored to individual risk. 相似文献29.
30.