全文获取类型
收费全文 | 8789篇 |
免费 | 375篇 |
国内免费 | 168篇 |
专业分类
耳鼻咽喉 | 58篇 |
儿科学 | 150篇 |
妇产科学 | 34篇 |
基础医学 | 564篇 |
口腔科学 | 52篇 |
临床医学 | 695篇 |
内科学 | 916篇 |
皮肤病学 | 62篇 |
神经病学 | 228篇 |
特种医学 | 244篇 |
外国民族医学 | 1篇 |
外科学 | 3467篇 |
综合类 | 1045篇 |
预防医学 | 806篇 |
眼科学 | 98篇 |
药学 | 383篇 |
8篇 | |
中国医学 | 263篇 |
肿瘤学 | 258篇 |
出版年
2023年 | 160篇 |
2022年 | 326篇 |
2021年 | 304篇 |
2020年 | 281篇 |
2019年 | 288篇 |
2018年 | 251篇 |
2017年 | 258篇 |
2016年 | 214篇 |
2015年 | 261篇 |
2014年 | 624篇 |
2013年 | 705篇 |
2012年 | 573篇 |
2011年 | 601篇 |
2010年 | 445篇 |
2009年 | 442篇 |
2008年 | 426篇 |
2007年 | 365篇 |
2006年 | 314篇 |
2005年 | 288篇 |
2004年 | 259篇 |
2003年 | 230篇 |
2002年 | 198篇 |
2001年 | 173篇 |
2000年 | 159篇 |
1999年 | 148篇 |
1998年 | 108篇 |
1997年 | 72篇 |
1996年 | 67篇 |
1995年 | 90篇 |
1994年 | 73篇 |
1993年 | 37篇 |
1992年 | 49篇 |
1991年 | 33篇 |
1990年 | 40篇 |
1989年 | 40篇 |
1988年 | 37篇 |
1987年 | 40篇 |
1986年 | 38篇 |
1985年 | 59篇 |
1984年 | 64篇 |
1983年 | 23篇 |
1982年 | 37篇 |
1981年 | 32篇 |
1980年 | 28篇 |
1979年 | 23篇 |
1978年 | 17篇 |
1977年 | 16篇 |
1976年 | 9篇 |
1973年 | 2篇 |
1971年 | 2篇 |
排序方式: 共有9332条查询结果,搜索用时 15 毫秒
1.
目的探讨对老年类风湿性关节炎(RA)应用辅助任务导向训练的干预对其手功能康复以及生存质量的影响。方法选取佛山市第五人民医院治疗的老年RA患者80例,根据入院先后顺序,通过随机数字表分为治疗组40例与对照组40例,入组患者均给予规范抗风湿药物常规治疗,对照组采取常规手部抗阻训练方式,治疗组则在对照组的基础上给予辅助任务导向训练干预,对两组干预1个月,比较干预前后两组患者手指总主动活动度(TAM)、握力、改良Barthel指数评分以及生活质量评价量表(SF-36)评分情况。结果①两组患者治疗前双侧手指TAM、握力、改良Barthel指数评分以及SF-36评分比较差异无统计学意义(P>0.05)。②治疗后,两组双侧手指TAM、握力、改良Barthel指数评分以及SF-36评分分别较组内治疗前明显改善(P<0.05)。治疗后治疗组左手TAM(268.25±20.62)°与右手TAM(259.93±23.44)°分别高于对照组左手TAM(235.56±25.21)°与右手TAM(224.37±21.86)°(P<0.05);治疗后治疗组左手握力(75.12±8.09)mmHg(1 mmHg=0.133 kPa)与右手握力(79.62±7.86)mmHg分别高于对照组左手握力(62.56±7.78)mmHg与右手握力(65.13±8.10)mmHg(P<0.05);治疗后治疗组改良Barthel指数评分(35.25±4.60)分高于对照组改良Barthel指数评分(31.56±5.25)分(P<0.05);治疗后治疗组SF-36评分(88.25±11.62)分高于对照组SF-36评分(80.56±16.21)分(P<0.05)。结论对老年RA进行辅助任务导向训练干预可提高患者手部关节活动度,增强手部握力,提高日常生活手功能活动能力以及改善生存质量水平。 相似文献
2.
目的探究磁共振成像(MRI)常规序列与三维扰相脂肪抑制梯度回波(3D-WATS)序列对早期类风湿性关节炎手关节病变的诊断价值。方法前瞻性选取2019年1月至2020年1月丹东市第一医院收治的80例疑似早期类风湿关节炎(RA)手关节病变患者作为研究对象。所有患者入院后分别行MRI常规序列及3D-WATS序列诊断,将诊断结果与病理结果对照,分析不同序列对早期RA手关节病变检出情况以及诊断的敏感性、准确性与特异性。结果病理诊断结果显示,80例患者中52例确诊为RA手关节病变阳性,28例为阴性;经3D-WATS序列诊断显示RA手关节病变阳性49例,阴性26例;MRI常规序列检出RA手关节病变阳性40例、阴性20例。3D-WATS序列诊断RA手关节病变的敏感性(94.23%)、特异性(92.86%)及准确率(93.75%)均显著高于MRI常规序列诊断(76.92%,71.43%,75.00%),差异均有统计学意义(P <0.05);3D-WATS序列对关节滑膜炎、骨侵蚀检出率(87.50%,66.25%)明显高于MRI常规序列(68.75%,50.00%),差异均有统计学意义(P <0.05)。结论 MRI 3D-WATS序列诊断早期类风湿性关节炎手关节病变敏感性、特异性及准确率高,能够有效检出关节滑膜炎、骨侵蚀等情况,优于MRI常规序列诊断,能够为临床治疗提供可靠依据,值得临床推广应用。 相似文献
3.
目的 对手卫生行为量表(Hand Hygiene Behaviour Questionnaire,HHBQ)进行汉化,并检验其信效度。方法 根据跨文化调试指南,对HHBQ进行前译、前译综合、回译、回译综合、原作者审核、专家咨询、预测试,形成中文版HHBQ。2021年7月—10月对杭州市3所三级甲等医院的537名医务人员进行调查,评价中文版HHBQ的信效度。 结果 中文版HHBQ包含3个维度,分别是手卫生能力(5个条目)、手卫生机会(7个条目)、手卫生动机(5个条目)。总量表内容效度指数为0.995,量表各条目内容效度指数为0.923~1.000。探索性因子分析共提取3个公因子,累计方差贡献率为68.741%。验证性因子分析显示模型拟合度良好。总量表的Cronbach’s α系数为0.918,各维度的Cronbach’s α系数为0.871~0.906。量表的重测信度为0.739。 结论 中文版HHBQ具有良好的信效度,可全面评估医务人员手卫生的影响因素。 相似文献
4.
Objective: To study the active ingredients in the root bark of Aralia echinocaulis.
Methods: Three triterpenoid saponins were separated from the 70% ethanol extracts and purified by column chromatography and their structures were determined by spectroscopic analysis. Compound 1 and 3 were evaluated for antioxidant activity by the in vitro DPPH free radical scavenging ability and the protective effect of OH- induced DNA oxidative damage.
Results: Compound 1 was a new type of triterpenoid saponin, named as echinocaulisaglycone 3-O-β-D-glucopyranoside (echinocaulisaponin A), and it had good antioxidant activity. Compound 2 was similar to compound 1, named as 1-hydroxyl-echinocaulisaglycone 3-O-β-D-glucopyranoside (echinocaulisaponin B). Compound 3 was also a new type of triterpenoid saponin, named as echinocaulisaglycone II 3-O-α-L-arabinopyranosyl-(1”→4’)-β-D-glucopyranosiduronic acid (echinocaulisaponin C), and its antioxidant activity was weaker than compound 1.
Conclusion: In this study, three new compounds were discovered and two of them were carried out in vitro anti-oxidation studies, laying the foundation for further research on the treatment of related diseases (cardiovascular disease, arthritis, age-related macular degeneration, etc.) through anti-oxidation or quenching free radical function. 相似文献
5.
目的:探讨鼻泪管填塞联合黏弹剂注入在不易寻找断端的复杂泪小管吻合术中定位鼻侧断端的应用效果。
方法:对我院收治13例13眼不易寻找断端的外伤性单根泪小管断裂患者,采用RS泪道引流管自完整的泪小管插入泪道填塞鼻泪管,再注入黏弹剂,使黏弹剂自断裂泪小管的鼻侧断端溢出,用于定位不易寻找鼻侧断端,并完成泪小管吻合手术。
结果:不易寻找断端的患眼13眼,使用RS泪道引流管填塞鼻泪管,在注入黏弹剂后,可在显微镜直视下发现凝胶自鼻侧断端溢出,并成功置入泪道引流管,断端寻找成功率为100%。13眼均置管3mo后拔管,随访6mo。其中治愈9眼,显效3眼,无效1眼。治愈率69%,总有效率92%。
结论:鼻泪管填塞联合黏弹剂注入操作简单,对术者的临床经验要求相对较低,适合不同程度的单根泪小管断裂患者,能够在较短的时间内完成不易寻找断端的复杂泪小管断裂吻合手术,是一种新的快速定位鼻侧断端的技术。 相似文献
6.
7.
8.
ObjectivesTo evaluate the long-term effectiveness of an action research intervention aimed at improving hand hygiene in an intensive care unit of a public hospital in Italy.MethodsAn observational, prospective before-after study was carried out. Compliance with hand hygiene was estimated by measuring the utilization of hand hygiene products before the intervention and four years after the end of the project. Products used were the following: detergent liquid soap, antiseptic liquid soap and alcohol-based hand gel. Endpoints were quantity consumed (in grams) for each product category. Quantitative consumptions per workshift were compared.ResultsIn 2017 the median consumption of antiseptic liquid soap and alcohol-based hand gel per workshift was significantly higher than in 2012 (111.5 g vs 72.5 g, p = 0.014, and 18.0 g vs 5.0 g, p < 0.001). Odds in favour of a higher value in 2017 were 1.99:1 (CI95%: 1.19:1 to 3.73:1) for antiseptic solution, and 5.39:1 (CI95%: 3.09:1 to 13.61:1) for antiseptic gel. Covariates were not associated with consumption of products, and this made it possible to compare the measurements in the two data collections.ConclusionsResults of this study support the long-term effectiveness of the action research intervention to improve practices of hand hygiene in an intensive care setting. 相似文献
9.
《Injury》2023,54(7):110767
AimThis network meta-analysis aims to compare functional outcomes and complications between conservative treatment and surgery for distal radius fractures in patients aged 60 years and over.MethodsWe searched the PubMed, EMBASE, and Web of Science databases for randomized controlled trials (RCTs) assessing the effect of conservative treatment and surgery for distal radius fractures in patients aged 60 years and over. Primary outcomes included grip strength and overall complications. Secondary outcomes included Disabilities of the Arm, Shoulder, and Hand (DASH) scores, Patient-Rated Wrist Evaluation (PRWE) scores, wrist range of motion and forearm rotation, and radiographic assessment. All continuous outcomes were assessed using standardized mean differences (SMDs) with 95% confidence intervals (CIs), and binary outcomes were assessed using odds ratio (OR) with 95% CIs. The surface under the cumulative ranking curve (SUCRA) was used to determine a hierarchy of treatments. Cluster analysis was performed for grouping treatments based on the SUCRA values of primary outcomes.ResultsFourteen RCTs were included to compare conservative treatment, volar lockedplate (VLP), K-wires fixation, and external-fixation. VLP outperformed conservative treatment for 1-year and minimum 2-year grip strength (SMD; 0.28 [0.07 to 0.48] and 0.27 [0.02 to 0.53], respectively). VLP yielded the optimal grip strength at 1-year and minimum 2-year follow-up (SUCRA; 89.8% and 86.7%, respectively). In a subgroup analysis of patients aged 60 to 80 years old, VLP outperformed conservative treatment in DASH and PRWE scores (SMD, 0.33 [0.10, 0.56] and 0.23 [0.01, 0.45], respectively). In addition, VLP had the fewest complications (SUCRA = 84.3%). Cluster analysis suggested that VLP and K-wire fixation were more effective treatment groups.ConclusionEvidence to date demonstrates that VLP provides measurable benefits in grip strength and fewer complications to those 60 years of age and over, and that benefit is not reflected in current practice guidelines. There is a subgroup of patients where K-wire fixation outcomes are similar to those of VLP; defining this subgroup may yield substantial societal benefits. 相似文献
10.