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   378786篇
  免费   25711篇
  国内免费   8560篇
耳鼻咽喉   4357篇
儿科学   9864篇
妇产科学   6738篇
基础医学   29732篇
口腔科学   8473篇
临床医学   40907篇
内科学   44351篇
皮肤病学   5019篇
神经病学   20948篇
特种医学   9059篇
外国民族医学   35篇
外科学   37980篇
综合类   60057篇
现状与发展   16篇
一般理论   29篇
预防医学   38898篇
眼科学   5866篇
药学   38526篇
  819篇
中国医学   36145篇
肿瘤学   15238篇
  2023年   5708篇
  2022年   9027篇
  2021年   14732篇
  2020年   14009篇
  2019年   18997篇
  2018年   16722篇
  2017年   14122篇
  2016年   12278篇
  2015年   11384篇
  2014年   23894篇
  2013年   25057篇
  2012年   21573篇
  2011年   22815篇
  2010年   18168篇
  2009年   16386篇
  2008年   15783篇
  2007年   16388篇
  2006年   14234篇
  2005年   12375篇
  2004年   9987篇
  2003年   8819篇
  2002年   6973篇
  2001年   6249篇
  2000年   5132篇
  1999年   4498篇
  1998年   3640篇
  1997年   3441篇
  1996年   2994篇
  1995年   2887篇
  1994年   2756篇
  1993年   2189篇
  1992年   2245篇
  1991年   1932篇
  1990年   1729篇
  1989年   1554篇
  1988年   1463篇
  1987年   1249篇
  1985年   3941篇
  1984年   4918篇
  1983年   3419篇
  1982年   3887篇
  1981年   3611篇
  1980年   3203篇
  1979年   2960篇
  1978年   2576篇
  1977年   1951篇
  1976年   2185篇
  1975年   1663篇
  1974年   1444篇
  1973年   1289篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
81.
Erosive pustular dermatosis of the scalp (EPDS) is an uncommon chronic inflammatory response to scalp trauma that usually resolves with cicatricial alopecia. It most commonly affects elderly patients with a history of actinic damage. Herein, we describe a 16‐year‐old girl with acrofacial dysostosis type 1 presenting after surgery with crusting purulent scalp lesions, whose clinical presentation and histopathologic findings were consistent with EPDS. A review of the literature on EPDS in children is also detailed.  相似文献   
82.
Alzheimer’s disease is characterized by the extracellular accumulation of the amyloidβin the form of amyloid plaques and the intracellular deposition of the microtubule-associated protein tau in the form of neurofibrillary tangles.Most of the Alzheimer’s drugs targeting amyloidβhave been failed in clinical trials.Particularly,tau pathology connects greatly in the pathogenesis of Alzheimer’s disease.Tau protein enhances the stabilization of microtubules that leads to the appropriate function of the neuron.Changes in the quantity or the conformation of tau protein could affect its function as a microtubules stabilizer and some of the processes wherein it is involved.The molecular mechanisms leading to the accumulation of tau are principally signified by numerous posttranslational modifications that change its conformation and structural state.Therefore,aberrant phosphorylation,as well as truncation of tau protein,has come into focus as significant mechanisms that make tau protein in a pathological entity.Furthermore,the shape-shifting nature of tau advocates to comprehend the progression of Alzheimer’s disease precisely.In this review,we emphasize the recent studies about the toxic and shape-shifting nature of tau in the pathogenesis of Alzheimer’s disease.  相似文献   
83.
84.
85.
86.
87.
薛云鹤 《中外医疗》2016,(22):64-66
目的:探析手指钝性离断伤采用断指再植手术治疗的临床效果。方法整群选择2013年6月—2014年6月期间该院收治的手指钝性离断伤患者59例为研究对象,对其临床治疗资料进行回顾性分析。结果该组的59例患者中,术后断指再成活54例,占91.53%,5例失败,占8.47%,其中手指远端坏死3例,占5.08%,2例术后感染,占3.39%。结论临床上给予手指钝性离断伤患者断指再植手术治疗,可以获得较好的效果,有助于恢复患者的手指功能。  相似文献   
88.
89.
90.
The Combined Aerobic and Resistance Exercise (CARE) Trial compared different types and doses of exercise performed during breast cancer chemotherapy. Here, we report the longer-term follow-up of patient-reported outcomes, health-related fitness and exercise behavior at 6, 12 and 24 months postintervention. A multicenter trial in Canada randomized 301 breast cancer patients initiating chemotherapy to thrice weekly, supervised exercise consisting of a standard dose of 25–30 min of aerobic exercise (STAN; n = 96), a higher dose of 50–60 min of aerobic exercise (HIGH; n = 101) or a combined dose of 50–60 min of aerobic and resistance exercise (COMB; n = 104) performed for the duration of chemotherapy (median of 17 weeks). Primary outcomes were patient-reported outcomes including quality of life, cancer-related symptoms and psychosocial outcomes. Secondary outcomes were objective health-related fitness (assessed at 12 months only) and self-reported exercise behavior. A total of 269 (89.4%) participants completed patient-reported outcomes at all three follow-up time points and 263 (87.4%) completed the health-related fitness assessment at 12-month follow-up. COMB was significantly superior to (i) STAN for sleep quality at 6-month follow-up (p = 0.027); (ii) HIGH for upper body muscular endurance at 12-month follow-up (p = 0.020); and (iii) HIGH for meeting the resistance exercise guideline at 6-month follow-up (p = 0.006). Moreover, self-reported meeting of the combined exercise guideline during follow-up was significantly associated with better patient-reported outcomes and health-related fitness. Performing combined exercise during and after breast cancer chemotherapy may result in better longer-term patient-reported outcomes and health-related fitness compared to performing aerobic exercise alone.  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