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   43213篇
  免费   3006篇
  国内免费   1994篇
耳鼻咽喉   353篇
儿科学   3037篇
妇产科学   573篇
基础医学   2815篇
口腔科学   208篇
临床医学   6042篇
内科学   2572篇
皮肤病学   66篇
神经病学   9259篇
特种医学   1883篇
外国民族医学   1篇
外科学   2513篇
综合类   8558篇
预防医学   2457篇
眼科学   471篇
药学   4086篇
  60篇
中国医学   3042篇
肿瘤学   217篇
  2023年   474篇
  2022年   804篇
  2021年   1357篇
  2020年   1496篇
  2019年   1203篇
  2018年   1159篇
  2017年   1480篇
  2016年   1577篇
  2015年   1497篇
  2014年   2774篇
  2013年   2985篇
  2012年   2652篇
  2011年   2733篇
  2010年   2268篇
  2009年   2066篇
  2008年   2065篇
  2007年   2139篇
  2006年   2048篇
  2005年   1795篇
  2004年   1582篇
  2003年   1494篇
  2002年   1258篇
  2001年   1113篇
  2000年   995篇
  1999年   851篇
  1998年   655篇
  1997年   595篇
  1996年   487篇
  1995年   456篇
  1994年   453篇
  1993年   355篇
  1992年   323篇
  1991年   308篇
  1990年   255篇
  1989年   245篇
  1988年   213篇
  1987年   189篇
  1986年   199篇
  1985年   244篇
  1984年   205篇
  1983年   168篇
  1982年   189篇
  1981年   203篇
  1980年   135篇
  1979年   100篇
  1978年   57篇
  1977年   57篇
  1976年   52篇
  1975年   38篇
  1974年   32篇
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
1.
An ovine iliac vein thrombosis model was devised to test a wall-contacting rotational thrombectomy device. Thrombosis was successfully induced in 9 sheep with an average clot length of 31 mm ± 12 and >60% vessel occlusion on angiography. The thrombus was subsequently removed, maintaining normal intraoperative pulmonary arterial pressure (5.9 mm Hg ± 3.6) and complete distal reperfusion after thrombectomy. Additionally, the sheep were without signs of vascular trauma or embolic complications on gross necropsy and histopathologic analysis. The findings from this study support the use of an ovine iliac deep vein thrombosis model for testing of a lower extremity thrombectomy device.  相似文献   
2.
3.
目的:探讨基于罗森塔尔效应的护理干预对脑出血后遗症病人的心理状况和生活质量的影响。方法:按照随机数字表法将2019年1月—2021年1月收治的98例脑出血后遗症病人分为对照组和观察组各49例,对照组实施常规护理,观察组在常规护理基础上给予基于罗森塔尔效应的护理干预。干预前后采用卒中量表(NIHSS)、功能独立性评定量表(FIM)、生活活动功能测量量表Barthel指数(BADL)评定两组病人康复情况,采用非精神病性焦虑量表(HADS-A)、非精神病性抑郁量表(HADS-D)、自我效能量表(GSES)评定两组病人心理状态,采用生活质量简明调查表(SF-36)评定两组病人生活质量。结果:观察组病人干预后NIHSS评分低于对照组,FIM和BADL评分高于对照组(P<0.05);观察组病人干预后HADS-A和HADS-D评分低于对照组,GSES评分高于对照组(P<0.05);观察组病人干预后生活质量各维度(躯体功能、躯体角色、肌体疼痛、总体健康、活力、社会功能、情绪角色、心理卫生)评分均明显高于对照组(P<0.05)。结论:基于罗森塔尔效应的护理干预应用于脑出血后遗症病人能有效促进病人康复,改善病人心理状态,提高病人生活质量。  相似文献   
4.
Sinensetin is a polymethoxylated flavone with anti-inflammatory and anti-oxidative activities. This work aimed to explore the function and mechanism of sinensetin in oxygen and glucose deprivation/reperfusion (OGD/R)-induced neurotoxicity. The overlapping target genes of cerebral stroke and sinensetin were determined according to GeneCards and ParmMapper tools and were subjected to Gene Ontology (GO) annotations and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses. Human cerebral microvascular endothelial cells (HCMECs) were stimulated with OGD/R. Neurotoxicity was investigated by Cell Counting Kit-8, lactate dehydrogenase (LDH) release, reactive oxygen species (ROS) level, qRT-PCR, and TUNEL analysis. The proteins (p38, JNK, and ERK) in mitogen-activated protein kinase (MAPK) signaling were measured using Western blotting. Total of 50 overlapping target genes of cerebral stroke and sinensetin were predicted. Pathway analysis showed they might be involved in the MAPK pathway. Sinensetin attenuated OGD/R-induced neurotoxicity by mitigating viability reduction, LDH release, ROS generation, inflammatory response, and apoptosis in HCMECs. Sinensetin weakened OGD/R-induced activation of the MAPK pathway via decreasing the phosphorylation of p38, JNK, and ERK. The pathway inhibitors mitigated the activation of the MAPK signaling, and sinensetin exacerbated this effect. The inhibitors reversed OGD/R-induced neurotoxicity in HCMECs, and sinensetin contributed to this role. Overall, sinensetin prevents OGD/R-induced neurotoxicity through decreasing the activation of MAPK pathway.  相似文献   
5.
BackgroundThe Fullerton Advanced Balance Scale (FAB) is a multi-item balance assessment test designed to measure balance in relatively higher functioning individuals. The aim of this study was to examine the reliability and validity of the Turkish version of the FAB (FAB-T) in children with cerebral palsy (CP).Research questionIs the Turkish version of the Fullerton Advance Balance Scale valid and reliable in determining balance problems in children with cerebral palsy and determining the underlying cause of this condition?MethodsForty-six children with CP participated in this study. Rasch analysis was used to investigate item adherence. Internal consistency of the FAB-T was established using Cronbach's alpha coefficient. Test-retest reliability was also evaluated. In addition, to assess concurrent validity, FAB-T scores were compared with the Pediatric Balance Scale (PBS) using the Spearman correlation coefficient.ResultsThe FAB-T showed satisfactory internal consistency (Cronbach's alpha value=0.94) and excellent test-retest reliability (ICC=0.99). The FAB and the PBS exhibited concurrent positive validity (r = 0.913; p < 0.001). All items of the FAB-T were found to fit the Rasch Model (Chi-square 16.01(df=20), p = 0.716).SignificanceThe FAB-T is a reliable and valid tool that can be used to measure balance skills and to identify the source of the problem in children with CP.  相似文献   
6.
The discussion paper will focus on continuity of care relating to previous NZ research, specifically to transitioning complex preterm infants from NICU to home based on parent experiences, and on the practice developments that have occurred, to ensure optimal health outcomes. Previous NZ research discovered parent desire a consistent service delivery for the entire transition journey from NICU and at home.An informative and comprehensive opportunity has occurred for reflective professional practice, evaluation, development and implementation which have transpired in positive change through innovative practice developments and support change implementation in Wellington, NZ. This has resulted in the articulation of a model of care that has both embraced and integrated parental desires for a continuity of care process for complex preterm infants. This has been achieved by having the same Discharge Facilitator/Key Case Manager present within the NICU and external to the NICU for Home-based infants for the entire transition journey.The paper will focus and emphasis additional practice development changes and furthermore, will present a real purpose, for other countries to learn of such practice developments that have exemplified a celebratory success for families of Wellington, NZ.  相似文献   
7.
目的研究中药药浴治疗痉挛型脑性瘫痪患儿的临床效果。方法选取2021年1月至12月于粤北人民医院儿童康复科确诊的80例痉挛型脑性瘫痪患儿,按随机数字表法分为对照组和观察组,每组各40例。对照组实施常规康复疗法,涉及运动疗法、作业疗法、物理因子治疗等,观察组进行常规康复治疗并结合中药药浴疗法,分别评估两组的肌张力及大运动功能并进行比较。结果治疗后观察组的肌张力低于对照组,大运动功能评估得分高于对照组,差异均有统计学意义(P<0.05)。结论中药药浴治疗痉挛型脑性瘫痪患儿可获得显著的效果,可改善肌张力,促进大运动功能提升,具有临床推广价值。  相似文献   
8.
9.
《Clinical neurophysiology》2021,132(6):1312-1320
ObjectiveTo investigate the additional value of EEG functional connectivity features, in addition to non-coupling EEG features, for outcome prediction of comatose patients after cardiac arrest.MethodsProspective, multicenter cohort study. Coherence, phase locking value, and mutual information were calculated in 19-channel EEGs at 12 h, 24 h and 48 h after cardiac arrest. Three sets of machine learning classification models were trained and validated with functional connectivity, EEG non-coupling features, and a combination of these. Neurological outcome was assessed at six months and categorized as “good” (Cerebral Performance Category [CPC] 1–2) or “poor” (CPC 3–5).ResultsWe included 594 patients (46% good outcome). A sensitivity of 51% (95% CI: 34–56%) at 100% specificity in predicting poor outcome was achieved by the best functional connectivity-based classifier at 12 h after cardiac arrest, while the best non-coupling-based model reached a sensitivity of 32% (0–54%) at 100% specificity using data at 12 h and 48 h. Combination of both sets of features achieved a sensitivity of 73% (50–77%) at 100% specificity.ConclusionFunctional connectivity measures improve EEG based prediction models for poor outcome of postanoxic coma.SignificanceFunctional connectivity features derived from early EEG hold potential to improve outcome prediction of coma after cardiac arrest.  相似文献   
10.
IntroductionHip displacement is common in cerebral palsy (CP) and is related to the severity of neurological and functional impairment. It is a silent, but progressive disease, and can result in significant morbidity and decreased quality of life, if left untreated. The pathophysiology of hip displacement in CP is a combination of hip flexor-adductor muscle spasticity, abductor muscle weakness, and delayed weight-bearing, resulting in proximal femoral deformities and progressive acetabular dysplasia. Due to a lack of symptoms in the early stages of hip displacement, the diagnosis is easily missed. Awareness of this condition and regular surveillance by clinical examination and serial radiographs of the hips are the key to early diagnosis and treatment.Hip surveillance programmesSeveral population-based studies from around the world have demonstrated that universal hip surveillance in children with CP allows early detection of hip displacement and appropriate early intervention, with a resultant decrease in painful dislocations. Global hip surveillance models are based upon the patients’ age, functional level determined by the Gross Motor Function Classification system (GMFCS), gait classification, standardized clinical exam, and radiographic indices such as the migration percentage (MP), as critical indicators of progressive hip displacement.ConclusionDespite 25 years of evidence showing the efficacy of established hip surveillance programmes, there is poor awareness among healthcare professionals in India about the importance of regular hip surveillance in children with CP. There is a need for professional organizations to develop evidence-based guidelines for hip surveillance which are relevant to the Indian context.  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