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   12640篇
  免费   1143篇
  国内免费   913篇
耳鼻咽喉   139篇
儿科学   87篇
妇产科学   138篇
基础医学   1489篇
口腔科学   170篇
临床医学   1633篇
内科学   1936篇
皮肤病学   97篇
神经病学   728篇
特种医学   409篇
外国民族医学   7篇
外科学   1228篇
综合类   2215篇
预防医学   764篇
眼科学   335篇
药学   1325篇
  13篇
中国医学   787篇
肿瘤学   1196篇
  2024年   49篇
  2023年   209篇
  2022年   541篇
  2021年   700篇
  2020年   551篇
  2019年   395篇
  2018年   426篇
  2017年   360篇
  2016年   387篇
  2015年   566篇
  2014年   688篇
  2013年   559篇
  2012年   853篇
  2011年   976篇
  2010年   558篇
  2009年   443篇
  2008年   717篇
  2007年   594篇
  2006年   582篇
  2005年   661篇
  2004年   440篇
  2003年   467篇
  2002年   400篇
  2001年   317篇
  2000年   324篇
  1999年   321篇
  1998年   219篇
  1997年   197篇
  1996年   178篇
  1995年   168篇
  1994年   125篇
  1993年   73篇
  1992年   97篇
  1991年   106篇
  1990年   93篇
  1989年   73篇
  1988年   67篇
  1987年   70篇
  1986年   51篇
  1985年   45篇
  1984年   14篇
  1983年   8篇
  1982年   10篇
  1981年   5篇
  1980年   2篇
  1979年   8篇
  1978年   1篇
  1968年   1篇
  1936年   1篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
EB病毒VCA-IgA抗体水平与鼻咽癌病人远期疗效关系   总被引:6,自引:1,他引:6  
刘孟忠  管迅行 《癌症》1998,17(5):365-367
目的:分析EB病毒血清学VCA-IgA抗体与鼻咽癌病人远期疗效关系,为临床治疗提供参考依据。方法:1985年本院病理确诊的522例鼻咽癌病人,按治疗前、后VCA-IgA抗体滴度分为三组:低滴度组(1:5~1:20)、中滴度组(1:40~1:80)和高滴度组(1:160以上),随访10年,比较生存率的异同。结果:治疗前鼻咽癌病人高滴度组10年生存率低于低滴度组(P<0.05),但和中滴度组差别无显著性(P>0.05)。治疗后三组病人10年生存率比较,高、中滴度二组差别无显著性(P>0.05),但低于低滴度组。结论:EB病毒VCA-IgA抗体水平可以作为估计预后的重要参考依据,与远期疗效有密切关系。  相似文献   
32.
Insulin-like growth factor-1 (IGF-1) has been shown to be neuroprotective when administered centrally following hypoxic-ischemic (HI) brain injury. However, the cerebral distribution and site of action of IGF-1 after intracerebroventricular (i.c.v.) administration are not known. A unilateral HI brain injury was induced in adult rats by a modified Levine method. Either 3H-IGF-1 alone, or in combination with unlabelled IGF-1, was administered into the lateral ventricle 2 h after injury. The activity of 3H-IGF-1 signal in the potentially injured cortex was compared between two treatment groups using image analysis. The regional distribution and cellular localisation of 3H-IGF-1 were examined autoradiographically in potentially injured hemispheres at 0.5 and 6 h after administration. Tritiated IGF-1 was detected predominantly in the pia mater, perivascular spaces and subcortical white matter tracts 0.5 h after administration and decreased by 6 h (p<0.05). The signals associated with the perivascular spaces and pia mater were not blocked by unlabelled IGF-1, suggesting non-saturable binding in these brain areas. IGF-1 signal was co-localised with IGF binding protein (IGFBP)-2 immunostaining in the white matter tracts where the signal was blocked by unlabelled IGF-1, suggesting competitive association. IGF-1 signal associated with neurons and glia was maximal in the cerebral cortex and less in the CA1-2 subregion of the hippocampus which were blocked by unlabelled IGF-1 (p<0.05). The signals from cortical neurons did not decrease 6 h after administration, suggesting specific and persistent binding to these cells. Our results indicate that centrally administered IGF-1 can be translocated to neurons and glia via the perivascular circulation and the ependymal cell-white matter tract pathways.  相似文献   
33.
The effect of the N-terminal tripeptide of insulin-like growth factor (IGF)-1, glycine-proline-glutamate (GPE), as a neuroprotective agent for nigro-striatal dopaminergic neurons was examined in the present study using a rat model of Parkinson's disease. A unilateral nigro-striatal lesion was induced in rats by injecting 6-hydroxydopamine (6-OHDA) into the right medial forebrain bundle (MFB). GPE (3 microgram) or its vehicle was administered intracerebroventricularly (i.c.v.) 2 h after the 6-OHDA lesion. Tyrosine-hydroxylase (TH) immunohistochemistry in the substantia nigra compacta (SNc) and the striatum were examined 2 weeks after the lesion. Following 6-OHDA injection, the number of TH immunopositive neurons in the ipsilateral SNc was reduced. The density of TH immunostaining was also reduced in the ipsilateral SNc and the striatum. Treatment with a single dose of GPE (n=9) significantly prevented the loss of TH immunopositive neurons (p<0. 001) and restored the TH immunoreactivity in both the SNc and the striatum compared with the vehicle control group (n=9, p<0.001). The results suggest that GPE showed promise as a potential treatment for Parkinson's disease.  相似文献   
34.
后囊膜混浊是白内障囊外摘除术后最主要的并发症之一。后囊膜混浊的发生是多因素参与的结果,手术方式的改进、人工晶状体的改良、术后炎症反应的控制都可以减少后囊膜混浊的发生。本文就人工晶状体的设计对后囊膜混浊的影响作一综述。  相似文献   
35.
目的:探讨超声乳化白内障摘除治疗晶状体溶解性青光眼的效果。方法:对25例晶状体溶解性青光眼患者控制眼压后行白内障摘除联合人工晶状体囊袋内植入术,观察术中、术后并发症,术后视力及眼压。结果:所有患者手术顺利,后囊完整,术后视力恢复好,眼压得到控制。所有患者无明显术中、术后并发症的发生。结论:超声乳化白内障摘除治疗晶状体溶解性青光眼安全有效。  相似文献   
36.
目的了解萘普生栓(NaproxenSuppositories)治疗产后宫缩痛的效果。方法对285例产后宫缩痛的产妇随机分成两组,实验组用萘普生一枚(0﹒25g)塞入肛门内2cm。对照组口服去痛片2片,记录疼痛开始减轻时间,镇痛效果、镇痛持续时间。结果①用药后15分钟疼痛开始减轻者:实验组80例,占55.17﹪;对照组0例。②疼痛缓解者:实验组108例,占74.5﹪。对照组60例,占42.8﹪。③镇痛时间超过8小时者:实验组110例,占79.1﹪。对照组20例,占16.7﹪。结论萘普生栓治疗产后宫缩痛高效、快速、持久。  相似文献   
37.
中药饮片小包装的剂量和质量管理   总被引:1,自引:0,他引:1  
中药饮片小包装作为一项新型的配方模式的改革,其优势非常明显。但在实际使用中主要存在剂量和质量上的问题。药房应从剂量和质量管理入手,一方面监督生产企业做好小包装的剂量和质量工作,另一方面加强医院药房对小包装的剂量和质量管理,提高配方质量,更好地发挥中药饮片小包装的优势。  相似文献   
38.
39.
Background:This study retrospectively investigated the effects of target nursing care (TNC) on anxiety and depression in patients with gallbladder cancer (GBC) during the perioperative period.Methods:This retrospective study analyzed the data of 80 patients with GBC during perioperative period. These records were divided into an intervention group (n = 40) or a control group (n = 40). All 80 patient records in both groups were administered routine nursing care (RNC). The patients in the intervention group also underwent TNC. The primary outcomes were depression (measured using the Hamilton Depression Scale, HAMD) and anxiety (assessed using the Hamilton Anxiety Scale, HAMA). The secondary outcomes were quality of life (assessed using the 36-Item Short Form Health Survey, SF-36) and adverse events. We collected and analyzed the outcome data before and after treatment.Results:After treatment, patients in the intervention group showed more promising effects on depression (HAMD, P < .01) and anxiety (HAMA, P < .01) than those in the control group did. However, there were no significant differences in the quality of life before and after treatment. No TNC- or RNC-associated adverse events were reported in patient records.Conclusion:This study found that TNC was more effective than RNC in relieving depression and anxiety. Future studies should be conducted to validate the present findings.  相似文献   
40.
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