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   4074篇
  免费   411篇
  国内免费   85篇
耳鼻咽喉   21篇
儿科学   64篇
妇产科学   32篇
基础医学   270篇
口腔科学   75篇
临床医学   319篇
内科学   296篇
皮肤病学   56篇
神经病学   433篇
特种医学   52篇
外科学   169篇
综合类   1388篇
一般理论   1篇
预防医学   346篇
眼科学   48篇
药学   329篇
  33篇
中国医学   490篇
肿瘤学   148篇
  2024年   9篇
  2023年   54篇
  2022年   134篇
  2021年   161篇
  2020年   176篇
  2019年   122篇
  2018年   97篇
  2017年   143篇
  2016年   132篇
  2015年   136篇
  2014年   293篇
  2013年   304篇
  2012年   257篇
  2011年   307篇
  2010年   275篇
  2009年   212篇
  2008年   257篇
  2007年   240篇
  2006年   226篇
  2005年   176篇
  2004年   131篇
  2003年   106篇
  2002年   65篇
  2001年   59篇
  2000年   65篇
  1999年   36篇
  1998年   30篇
  1997年   32篇
  1996年   17篇
  1995年   25篇
  1994年   22篇
  1993年   26篇
  1992年   21篇
  1991年   19篇
  1990年   18篇
  1989年   13篇
  1988年   21篇
  1987年   22篇
  1986年   11篇
  1985年   16篇
  1984年   26篇
  1983年   9篇
  1982年   18篇
  1981年   6篇
  1980年   9篇
  1979年   9篇
  1978年   7篇
  1977年   4篇
  1976年   5篇
  1975年   5篇
排序方式: 共有4570条查询结果,搜索用时 15 毫秒
11.
研究《金匮要略》的重点应该放在对于各种疾病的辨证论治上,而不是某些证或某些方。这里涉及到如何看待病与证以及辨病与辨证的关系。以《金匮要略》的基本学术思想立论,从四个方面阐述了在整体论思想指导下的辨证论治体系,首先注重的是病;辨证方法的确立是由在发病学上具有不同性质特点的疾病所决定的;四诊所得的各种临床信息是为了辨病然后辨证;只有正确把握病与证的关系,才有可能真正理解和掌握“治未病”的实质。  相似文献   
12.
This article identifies common characteristics of educationally related programs that form a common basis for understanding and working with gifted programs. Special approaches and programs for educational enrichment as well as specific activities that have been successful are discussed.  相似文献   
13.
为促进聋幼儿各方面的正常发展,使其早日回归主流社会,我们对聋幼儿进行了认知和情绪表现的研究。通过问卷调查、观察和实验研究得知,聋幼儿的认知发展和良好情绪的培养是分不开的,认知内容适中有利于聋幼儿良好情绪的培养,而良好积极的情绪又可促进聋幼儿认知的发展。对此,我们实验并总结了培养聋幼儿积极情绪和促进认知发展的方法。  相似文献   
14.
We studied a cohort of 496 patients who had multiple sclerosis (MS) for at least 10 years. Ten years after disease onset, 151 had benign MS defined as an Extended Disability Status Scale (EDSS) ≤3. Between benign and non-benign patients we compared gender, age at clinical onset, relapsing–remitting or primary progressive, symptoms at onset, recovery from first relapse, time between first and second relapse, number of relapses in the first 5 years, use of immunomodulatory drugs, and EDSS scores at 2, 5 and 10 years. A multivariate regression analysis showed that a relapsing–remitting course, a low EDSS score at 5 years, and a low number of relapses in the first 5 years were predictive for benign MS at 10 years. Other factors had no additional value. Thirty-five of the 51 patients (69%) with benign MS at 10 years were still benign at 20 years. A low 10-year EDSS score was the only clinical variable associated with a benign course at 20 years. Our results suggest that within the first 5 years from onset it is not possible to predict a benign course. Disease course, EDSS score and relapse rate at 5 years are predictors for benign MS at 10 years.  相似文献   
15.
BACKGROUND: Recent research has addressed the issue of subtyping juvenile bipolar disorder (JBD). Accordingly, we set out to find out, in a naturalistic sample of bipolar children and adolescents with mania and mixed mania, whether the most useful subtyping should be based on clinical features (elated vs. irritable) or course (episodic vs. chronic). METHODS: We studied 136 patients, 81 male patients (59.6%) and 55 female patients (40.4%), mean age 13.5 +/- 2.9 years, meeting the DSM-IV diagnosis of bipolar disorder, assessed by a structured clinical interview (Schedule for Affective Disorders and Schizophrenia for School-Age Children-Present and Lifetime Version [K-SADS-PL]). RESULTS: Regarding course, 77 patients (56.6%) had an episodic course and 59 patients (43.4%) had a chronic course. Patients with chronic course were significantly younger, had an earlier onset of JBD, and presented a more frequent comorbidity with disruptive behavior disorders. According to the prevalent mood disturbance, 75 patients (55.1%) showed an elated and 61 patients (44.9%) showed an irritable mood. Elated mood was more frequent in patients with episodic course, whereas irritable mood was more frequent in the patients with chronic course. CONCLUSIONS: These findings suggest that chronic versus episodic course may be a putative differential feature. Further validation of such a distinction would require prospective studies, temperament evaluation, gender and neurobiologic approaches, and differential psychopharmacologic assignment and response.  相似文献   
16.
食管癌三维适形后程加速超分割放射治疗的疗效分析   总被引:3,自引:0,他引:3  
目的评价三维适形后程加速超分割放射治疗食管癌的疗效及放疗反应、并发症。方法2002年2月至2004年5月,71例食管鳞癌随机分成两组,三维适形后程加速超分割组36例,食管病变上下外约4cm,前后、左右外约0.5~1cm作为PTV1,每次2GY,每周5次,DT40GY后,病变上下外约2cm,前后、左右外约0.5~1cm作为PTV2,每日2次,每次1.5GY,间隔4~6小时,总疗程6周,总剂量67GY/38次。非三维适形后程加速超分割组35例,时间、剂量、分割方式同适形组。所有病例均采用8MV-X外照射。结果1、2、3年的生存率和原发肿瘤的局控率,与非适形后程加速超分割比较,适形组明显提高,分别为88.9%、75%、63.9%比68.6%、51.4%、40%和86.1%、72.2%、58.3%比65.7%、48.5%、34.3%。适形组的急性放射反应明显低于非适形后程加速超分割组,两组有显著差别。结论本研究的初步结果表明食管癌适形后程加速超分割放射治疗的疗效优于非适形后程加速超分割组。  相似文献   
17.
高等院校专业课程开展双语教学的若干问题分析   总被引:46,自引:1,他引:45  
双语教学是贯彻教育“三个面向”原则在教学中的一个有效载体 ,双语教学核心目的仍然是专业的思想、内容与能力的学习与培养 ,讨论了专业课程双语教学的目标、基本条件、教学方法、考试考核及现阶段开展双语教学应注意的主要事项。  相似文献   
18.
Little is known about whether patients with photosensitive disorders exhibit a different ultraviolet erythema time course from subjects with a normal response to sunlight. We have described the application of an instrument for ambulatory monitoring of the development of ultraviolet erythema by a reflectance method in a group of patients with chronic actinic dermatitis (CAD) and in a group of normal subjects. Investigations of the time course have been reported previously but the techniques used relied upon manual measurement. Consequently sampling frequencies have been considerably lower than the one-minute sample rate used here. We have not demonstrated any difference in the rate at which erythema develops and peaks between patients with CAD and subjects with a normal response to sunlight.  相似文献   
19.
在医学有机化学课堂教学中,运用教学艺术提出了教学环节——引言的7种设计方法,让学生在生动活泼的气氛下,增强学习的主动性。  相似文献   
20.
Contemporary licensed treatments for multiple sclerosis fail to provide a solution for the disease because their effects are limited to a modest reduction in the frequency of new episodes. They do not reduce disability or materially influence the progressive phase of the disease. A contemporary strategy for management requires a more detailed analysis of the separate contributions to the clinical features and overall course made by inflammation, axonal injury, compensatory mechanisms, and remyelination. From this formulation emerges the need either for early and fully effective suppression of the inflammatory response, limiting the damage to all components of the axon-glial unit; or the development of strategies for axonal and myelin repair that solve the issues of controlled differentiation, delivery and timing of these cell and growth factor-based interventions.  相似文献   
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