首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   658篇
  免费   27篇
  国内免费   1篇
耳鼻咽喉   4篇
儿科学   13篇
妇产科学   11篇
基础医学   126篇
口腔科学   8篇
临床医学   46篇
内科学   126篇
皮肤病学   22篇
神经病学   111篇
特种医学   16篇
外国民族医学   4篇
外科学   70篇
综合类   2篇
预防医学   51篇
眼科学   11篇
药学   47篇
肿瘤学   18篇
  2019年   11篇
  2018年   8篇
  2015年   8篇
  2014年   8篇
  2013年   14篇
  2012年   9篇
  2011年   25篇
  2010年   14篇
  2009年   9篇
  2008年   19篇
  2007年   26篇
  2006年   16篇
  2005年   24篇
  2004年   22篇
  2003年   22篇
  2002年   21篇
  2001年   27篇
  2000年   28篇
  1999年   35篇
  1997年   6篇
  1995年   6篇
  1993年   6篇
  1992年   15篇
  1991年   8篇
  1990年   6篇
  1989年   8篇
  1988年   6篇
  1987年   7篇
  1984年   8篇
  1983年   6篇
  1981年   8篇
  1979年   8篇
  1976年   5篇
  1975年   10篇
  1974年   9篇
  1973年   6篇
  1972年   7篇
  1970年   5篇
  1969年   8篇
  1948年   5篇
  1947年   7篇
  1932年   4篇
  1929年   5篇
  1927年   4篇
  1926年   4篇
  1925年   5篇
  1924年   8篇
  1923年   8篇
  1922年   16篇
  1921年   4篇
排序方式: 共有686条查询结果,搜索用时 15 毫秒
101.
102.
103.
Determination of Metamizol and its Hydrolysis Product by Quantitative TLC Metamizol and its degradation product, 4-methylaminophenazone, were determined by TLC and in situ measurement of their reflectances. In metamizol solutions, used for injections, hydrolysis reaches 3.6 to 4.0 %. This degradation is independent of the storage time.  相似文献   
104.
105.
Summary Post-epidemic sera were collected from the recruits in a military camp and the content of antibody to A/Asia/57 was determined in a highly sensitive and specific haemagglutination inhibition test. Of 223 individuals examined 196 (88%) gave serological evidence of having been infected. Of 63 individuals hospitalized with a clinically typical influenza. 2 or 3 were serologically negative. Of 58 individuals with no typical influenza symptoms, antibody was demonstrated in 45 (78%). The most frequent incubation time before clinical symptoms occurred appeared to be 2 days.Supported by a grant from Forsvarets Sanitet.  相似文献   
106.
107.
108.
BACKGROUND: Depression is undertreated in primary care settings. Little research investigates the impact of patient involvement in decisions on guideline-concordant treatment and depression outcomes. OBJECTIVE: The objective of this study was to determine whether patient involvement in decision-making is associated with guideline-concordant care and improvement in depression symptoms. DESIGN: Prospective cohort study. SETTING: Multisite, nationwide randomized clinical trial of quality improvement strategies for depression in primary care. SUBJECTS: Primary care patients with current symptoms and probable depressive disorder. MEASUREMENTS: Patients rated their involvement in decision-making (IDM) about their care on a 5-point scale from poor to excellent 6 months after entry into the study. Depressive symptoms were measured every 6 months for 2 years using a modified version of the Center for Epidemiologic Studies-Depression (CES-D) scale. We examined probabilities (Pr) of receipt of guideline-concordant care and resolution of depression across IDM groups using multivariate logistic regression models controlling for patient and provider factors. RESULTS: For each 1-point increase in IDM ratings, the probability of patients' report of receiving guideline-concordant care increased 4% to 5% (adjusted Pr 0.31 vs. 0.50 for the lowest and highest IDM ratings, respectively, P < 0.001). Similarly, for each 1-point increase in IDM ratings, the probability of depression resolution increased 2% to 3% (adjusted Pr 0.10 vs. 0.19 for the lowest and highest IDM ratings respectively, P = 0.004). CONCLUSIONS: Depressed patients with higher ratings of involvement in medical decisions have a higher probability of receiving guideline-concordant care and improving their symptoms over an 18-month period. Interventions to increase patient involvement in decision-making may be an important means of improving care for and outcomes of depression.  相似文献   
109.
Lo Sasso AT  Rost K  Beck A 《Medical care》2006,44(4):352-358
BACKGROUND: The impact of depression on the workplace has been widely observed in studies examining absenteeism and reduced productivity during days at work. However, there is little scientific evidence about whether depression interventions are cost-beneficial to employers. OBJECTIVE: We construct a cost-benefit analysis of depression treatment under different workplace assumptions better reflecting the nature of employment. RESEARCH DESIGN: Data from a randomized controlled trial in which employed primary care patients with depression were treated in practices randomly assigned to an enhanced treatment intervention or usual care were used to construct a cost-benefit model from an employer perspective under different assumptions regarding employment. SUBJECTS: A national sample of 198 workers employed in a range of positions by companies was studied. MEASURES: Benefits included self-reported productivity and absenteeism; costs included intervention and treatment costs. Net benefit was calculated under different scenarios and return on investment (ROI) is derived. RESULTS: Enhanced depression treatment resulted in an average net benefit to the employer of Dollars 30 per participating worker in Year 1 of the intervention and Dollars 257 per participating worker in Year 2, for an estimated ROI during the 2-year period of 302%. ROI increased in firms that rely on team production, hire more costly substitute labor, or realize penalties for output shortfalls. ROI decreased in firms that have a large fraction of employees with dependent coverage and experience high turnover rates. Results also are sensitive to how subjectively reported productivity is valued. CONCLUSION: Many employers will receive a potentially significant ROI from depression treatment models that improve absenteeism and productivity at work.  相似文献   
110.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号