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   11633篇
  免费   716篇
  国内免费   66篇
耳鼻咽喉   111篇
儿科学   325篇
妇产科学   219篇
基础医学   1250篇
口腔科学   531篇
临床医学   978篇
内科学   2619篇
皮肤病学   217篇
神经病学   687篇
特种医学   340篇
外国民族医学   4篇
外科学   1787篇
综合类   520篇
一般理论   10篇
预防医学   747篇
眼科学   312篇
药学   1004篇
中国医学   68篇
肿瘤学   686篇
  2023年   151篇
  2022年   458篇
  2021年   793篇
  2020年   406篇
  2019年   483篇
  2018年   605篇
  2017年   336篇
  2016年   385篇
  2015年   392篇
  2014年   518篇
  2013年   642篇
  2012年   918篇
  2011年   912篇
  2010年   456篇
  2009年   392篇
  2008年   593篇
  2007年   600篇
  2006年   535篇
  2005年   527篇
  2004年   532篇
  2003年   412篇
  2002年   424篇
  2001年   81篇
  2000年   68篇
  1999年   62篇
  1998年   85篇
  1997年   49篇
  1996年   44篇
  1995年   57篇
  1994年   38篇
  1993年   25篇
  1992年   20篇
  1991年   36篇
  1990年   32篇
  1989年   33篇
  1988年   23篇
  1987年   24篇
  1986年   35篇
  1985年   20篇
  1984年   22篇
  1983年   21篇
  1982年   13篇
  1981年   22篇
  1980年   17篇
  1979年   14篇
  1978年   10篇
  1977年   10篇
  1975年   9篇
  1974年   10篇
  1970年   9篇
排序方式: 共有10000条查询结果,搜索用时 109 毫秒
131.
132.
ObjectiveTo assess serum vitamin D status and its relations to other biochemical parameters in type 2 diabetic patients from Gaza Strip.Materials and methodsThis case-control study included 58 type 2 diabetic patients as well as 58 non-diabetic controls. Patients and controls were matched for age and gender. Data were obtained from questionnaire interview, and biochemical analysis of blood samples.ResultsSerum vitamin D was significantly lower in diabetic patients compared to non-diabetic controls (25.9 ± 11.0 versus 34.6 ± 13.8 ng/dl, % difference = 28.8%, P < 0.001). The number of patients having vitamin D deficient, insufficient and sufficient were 6 (10.4%), 35 (60.3%) and 17 (29.3%) compared to controls of 3 (5.2%), 16 (27.6%) and 39 (67.2%), respectively (χ2 = 14.672, P < 0.001). Serum glucose, glycated hemoglobin (HbA1c), serum alanine aminotransferase (ALT), aspartate aminotransferase (AST) and triglycerides were significantly higher in patients than in controls whereas serum insulin, high density lipoprotein cholesterol (HDL-C) and calcium were significantly lower in patients. Serum vitamin D showed significant negative correlations with HbA1c (r = ? 0.186, P = 0.046), ALT (r = ? 192, P = 0.040) and AST (r = ? 0.188, P = 0.044) whereas significant positive correlations were found with HDL-C (r = 0.188, P = 0.044) and calcium (r = 0.239, P = 0.010).ConclusionThe significant negative and positive correlations of vitamin D with HbA1c and calcium, respectively suggests that vitamin D supplementation would be of potential therapeutic value in clinical settings for controlling of type 2 diabetes and more importantly its complications. However, a well-designed clinical trials are needed to define the contribution of vitamin D status and therapy in the global diabetes problem.  相似文献   
133.
134.
135.

Purpose

The main purpose of the study was to examine and identify factors that influence the future practice pattern of Saudi Board of Ophthalmology residents as well as their academic goals. This study also aimed to compare the plans and career goals of the current Saudi ophthalmology residents with a former cohort of Saudi ophthalmology residents.

Methods

All current residents of Saudi Board of Ophthalmology were invited to complete an anonymous online survey in March 2017. Residents were contacted by email. The survey contained questions on demographics, plans and factors influencing career choice of the residents in their future. Data were categorized by gender. Chi-square was used to assess the effect of gender on outcomes where appropriate.

Results

Of 150 residents surveyed, 91 (61%) responded to the survey. Having the ability to combine medicine and surgery was the most motivating factor for pursuing an ophthalmology residency training program (81% of respondents). Most residents expressed an interest in providing refractive surgery (62%), being involved in research activities (85%) and working part-time in the private sector (73%). The majority (81%) expressed a desire to practice in an urban setting as well as pursuing fellowship training (81%). Anterior segment (31%) and surgical retina (15%) were the most popular choices for fellowship training.

Conclusion

Increasing interest in joining fellowship training programs (mostly in surgical subspecialties) and being involved in research activities among current generation of ophthalmology residents have been observed compared to a previous cohort study in the same country.  相似文献   
136.
137.
138.
139.
140.
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