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   242篇
  免费   11篇
  国内免费   5篇
耳鼻咽喉   3篇
基础医学   6篇
临床医学   38篇
内科学   19篇
神经病学   5篇
特种医学   6篇
外科学   29篇
综合类   87篇
预防医学   31篇
药学   19篇
中国医学   8篇
肿瘤学   7篇
  2023年   2篇
  2022年   4篇
  2021年   3篇
  2020年   4篇
  2019年   5篇
  2018年   3篇
  2017年   3篇
  2016年   8篇
  2015年   4篇
  2014年   15篇
  2013年   8篇
  2012年   7篇
  2011年   16篇
  2010年   5篇
  2009年   13篇
  2008年   24篇
  2007年   19篇
  2006年   8篇
  2005年   6篇
  2004年   2篇
  2003年   6篇
  2002年   26篇
  2001年   25篇
  2000年   9篇
  1999年   2篇
  1998年   2篇
  1996年   2篇
  1995年   1篇
  1994年   5篇
  1993年   9篇
  1992年   3篇
  1991年   4篇
  1990年   1篇
  1989年   1篇
  1986年   1篇
  1984年   1篇
  1981年   1篇
排序方式: 共有258条查询结果,搜索用时 15 毫秒
21.
22.
Objective To discuss the diagnosis and outcome of multilocular cystic renal cell car-cinoma. Methods The clinic data of 1 case of multilocular cystic renal cell carcinoma were reviewed with its clinical manifestation, imaging, pathology and therapy in our hospital. The male patient aged 49 was incidentally found to have a right renal tumor. The CT scan showed a multiloeular cystic tumor in the low pole of the right kidney with a clear outline. The thin septa were found in the tumor, which were enhanced in the enhancement CT scan. The enhancement MRI showed the cystic wall was en-hanced. Results The patient received a partial nephrectomy as his treatment. The pathological char-acteristics were as following: the multilocular cystic tumor was about 3 cm×2 cm×2 cm with clear serosity in it. The cystic wall was smooth with the width of 0.1-0.2 cm. Most of the cystic cavities were covered by monostratified or stratified cubic clear cells, and some were covered by squamous epi-thelium or no epithelium at all. The septum was composed of collagen fiber, and clear cells were found in it. The clear cells form small collections but do not form expansile nodules. The final pathological diagnosis was multilocular cystic renal cell carcinoma. The follow-up was 20 months, without local re-currence or distant metastasis was found. Conclusions Multilocular cystic renal cell carcinoma (MCRCC) is a rare variant of renal cell carcinoma with a good prognosis. MCRCC is an uncommon tumor of the kidney composed of multiple cysts with clear cells in the septa indistinguishable from grade I renal cell carcinoma. Most patients are asymptomatie and the tumors are discovered inciden-tally. The preoperative diagnosis of MCRCC immediately depends on imaging studies. Pathology is the key to diagnosis.  相似文献   
23.
赖氨酸对机体健康促进作用的研究进展   总被引:2,自引:0,他引:2  
黄元新  鲁力 《广西医学》2008,30(7):1031-1033
赖氨酸是一种人体不能合成的必需氨基酸,在谷物食品中含量很低,而且在加工过程中易被破坏,所以,在膳食结构以谷物食物为主的人群中容易缺乏,从而影响了机体对膳食中蛋白质的吸收和利用,因而被称为粮谷类食品第一限制氨基酸.  相似文献   
24.
鲁力 《中国妇幼保健》2009,24(33):4703-4704
目的:建立贵阳市健康儿童静脉血血细胞的各参数参考值范围,并比较地区差异。方法:用CA-800三分类全自动血细胞分析仪检测2082例健康儿童静脉血血细胞的各参数,经统计学处理计算出参考值。结果:本组实验与北京医院的健康儿童参考值相比较,WBC低值大致相同,而高值本组实验结果低于北京健康儿童参考值;Hb、RBC高于北京健康儿童参考值;MCHC、MPV、PDW、RDW值较北京健康儿童参考值偏高;PLT、PCT值低于北京健康儿童参考值。结论:血细胞参考值与年龄、性别、种族有关。  相似文献   
25.
26.
目的:检测冠心病患者稳定期血清hs-CRP、MMP-2、MMP-9水平,探讨其在冠心病预后评估中的临床意义。方法:收集76例明确诊断为冠心病的病例,其中22例为陈旧性心肌梗死患者,同时以40例年龄、性别匹配的健康人为正常对照,比较两者血清hs-CRP、MMP-2、MMP-9水平差异。结果:冠心病患者血清hs-CRP、MMP-2、MMP-9水平显著高于对照组,但冠心病患者中陈旧性心梗与非心梗血清hs-CRP、MMP-2、MMP-9水平并无显著差异。结论:冠心病患者非急性期的血清hs-CRP、MMP-2、MMP-9水平越高,可能反映冠脉斑块稳定性越差,心脏组织的异常重构越严重,提示其发生心血管事件的可能性更大,预后更差。  相似文献   
27.
目的:探讨参松养心胶囊对非器质性期前收缩的疗效。方法:收集2004年3月~2006年9月心血管专科门诊非器质性期前收缩患者共90例,通过区组随机分别纳入参松养心胶囊治疗组30例(口服参松养心胶囊,每次4粒,每日3次)、倍他洛克治疗组30例(口服倍他洛克,每次12·5mg,每天1~2次,如无不良反应,1周后加量为每次25mg,每天1~2次)和空白对照组30例。试验时间4周,观察前后期前收缩和相关临床症状的变化。结果:参松养心胶囊和倍他洛克能够明显减少非器质性期前收缩患者的期前收缩次数,总有效率分别为73·33%和76·67%(P=0·77)。参松养心胶囊较倍他洛克更能有效改善非器质性期前收缩患者的临床症状,总有效率分别为86·67%和66·67%(P=0·04)。结论参松养心胶囊能够安全有效的纠正非器质性期前收缩患者的心律失常,并且对于改善非器质性期前收缩患者临床症状的疗效更加显著。  相似文献   
28.
本文测定了40例慢性肾小球疾病患者的血液过氧化氢酶.红细胞超氧化物歧化酶活力和血清丙醛含量.结果显示过氧化氢酶活力增高而超氧化物歧化酶活力降低.稳中有降清丙二醛含量亦增高.上述三项指标的变化均随年龄的增长而愈加显著.  相似文献   
29.
本对我校国家自然科学基金项目落选因素分析,以指导基金申报工作,并介绍一种统计方法-对应分析法,结果显示学术水平的相对下降是1994-1997年影响中标的主要因素,管理因素在1997年也有较高水平。加强科研管理,加强重点学科建设和学科带头人的培养,提高学术水平是提高基金中标率的重要工作。  相似文献   
30.
Objective To discuss the diagnosis and outcome of multilocular cystic renal cell car-cinoma. Methods The clinic data of 1 case of multilocular cystic renal cell carcinoma were reviewed with its clinical manifestation, imaging, pathology and therapy in our hospital. The male patient aged 49 was incidentally found to have a right renal tumor. The CT scan showed a multiloeular cystic tumor in the low pole of the right kidney with a clear outline. The thin septa were found in the tumor, which were enhanced in the enhancement CT scan. The enhancement MRI showed the cystic wall was en-hanced. Results The patient received a partial nephrectomy as his treatment. The pathological char-acteristics were as following: the multilocular cystic tumor was about 3 cm×2 cm×2 cm with clear serosity in it. The cystic wall was smooth with the width of 0.1-0.2 cm. Most of the cystic cavities were covered by monostratified or stratified cubic clear cells, and some were covered by squamous epi-thelium or no epithelium at all. The septum was composed of collagen fiber, and clear cells were found in it. The clear cells form small collections but do not form expansile nodules. The final pathological diagnosis was multilocular cystic renal cell carcinoma. The follow-up was 20 months, without local re-currence or distant metastasis was found. Conclusions Multilocular cystic renal cell carcinoma (MCRCC) is a rare variant of renal cell carcinoma with a good prognosis. MCRCC is an uncommon tumor of the kidney composed of multiple cysts with clear cells in the septa indistinguishable from grade I renal cell carcinoma. Most patients are asymptomatie and the tumors are discovered inciden-tally. The preoperative diagnosis of MCRCC immediately depends on imaging studies. Pathology is the key to diagnosis.  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