全文获取类型
收费全文 | 16669篇 |
免费 | 1030篇 |
国内免费 | 557篇 |
专业分类
耳鼻咽喉 | 136篇 |
儿科学 | 125篇 |
妇产科学 | 79篇 |
基础医学 | 1336篇 |
口腔科学 | 521篇 |
临床医学 | 1583篇 |
内科学 | 907篇 |
皮肤病学 | 63篇 |
神经病学 | 708篇 |
特种医学 | 559篇 |
外科学 | 3178篇 |
综合类 | 2951篇 |
预防医学 | 1718篇 |
眼科学 | 76篇 |
药学 | 2439篇 |
29篇 | |
中国医学 | 1703篇 |
肿瘤学 | 145篇 |
出版年
2024年 | 73篇 |
2023年 | 266篇 |
2022年 | 673篇 |
2021年 | 805篇 |
2020年 | 669篇 |
2019年 | 527篇 |
2018年 | 517篇 |
2017年 | 569篇 |
2016年 | 704篇 |
2015年 | 626篇 |
2014年 | 1345篇 |
2013年 | 1403篇 |
2012年 | 1279篇 |
2011年 | 1325篇 |
2010年 | 1017篇 |
2009年 | 835篇 |
2008年 | 784篇 |
2007年 | 748篇 |
2006年 | 642篇 |
2005年 | 527篇 |
2004年 | 447篇 |
2003年 | 384篇 |
2002年 | 273篇 |
2001年 | 242篇 |
2000年 | 207篇 |
1999年 | 156篇 |
1998年 | 144篇 |
1997年 | 127篇 |
1996年 | 107篇 |
1995年 | 92篇 |
1994年 | 81篇 |
1993年 | 77篇 |
1992年 | 79篇 |
1991年 | 61篇 |
1990年 | 52篇 |
1989年 | 54篇 |
1988年 | 54篇 |
1987年 | 52篇 |
1986年 | 27篇 |
1985年 | 35篇 |
1984年 | 28篇 |
1983年 | 27篇 |
1982年 | 23篇 |
1981年 | 25篇 |
1980年 | 14篇 |
1979年 | 12篇 |
1978年 | 12篇 |
1977年 | 12篇 |
1976年 | 4篇 |
1973年 | 6篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Kindergarten and first grade: A time for developing and nurturing gifted behaviors in young children
Patti L. Chance 《Early child development and care》1990,63(1):75-81
This article concludes that there is a tremendous need for gifted programs at the kindergarten and first grade levels. A review of the literature suggests that it is difficult to identify young gifted children through traditional screening techniques. The author concludes that Renzulli's Enrichment Triad Model may prove useful for identifying young gifted children. 相似文献
12.
13.
Edwin D. Boudreaux PhD Brian L. Cruz MD Brigitte M. Baumann MD 《Academic emergency medicine》2006,13(7):795-802
Objectives: The authors reviewed the evidence on performance improvement methods for increasing emergency department (ED) patient satisfaction to provide evidence-based suggestions for clinical practice.
Methods: Data sources consisted of searches through MEDLINE, CINAHL, PSYCHINFO, Cochrane Library, and Emergency Medicine Abstracts and a manual search of references. Articles were included if they reported a performance improvement intervention targeting patient satisfaction in the ED setting. Articles on studies not conducted in the United States or that failed to provide enough details to allow critical evaluation of the study were excluded. Two authors used structured evaluation criteria to independently review each retained study.
Results: Nineteen articles met all selection criteria. Three studies found varying levels of support for multicomponent interventions, predominantly focused on implementation of clinical practice guidelines for specific presenting complaints and process redesign. Sixteen studies evaluated single-component interventions, with the following having at least one supportive study: using alternating patient assignment to provider teams rather than "zone"-based assignment, enhancing provider communication and customer service skills, incorporating information delivery interventions (e.g., pamphlets, video) that target patient expectations, using preformatted charts, and establishing ED-based observation units for specific conditions such as asthma and chest pain.
Conclusions: There is modest evidence supporting a range of performance improvement interventions for improving ED patient satisfaction. Further work is needed before specific, evidence-based recommendations can be made regarding which process changes are most effective. Recommendations are made for improving the quality of performance improvement efforts in the ED setting. 相似文献
Methods: Data sources consisted of searches through MEDLINE, CINAHL, PSYCHINFO, Cochrane Library, and Emergency Medicine Abstracts and a manual search of references. Articles were included if they reported a performance improvement intervention targeting patient satisfaction in the ED setting. Articles on studies not conducted in the United States or that failed to provide enough details to allow critical evaluation of the study were excluded. Two authors used structured evaluation criteria to independently review each retained study.
Results: Nineteen articles met all selection criteria. Three studies found varying levels of support for multicomponent interventions, predominantly focused on implementation of clinical practice guidelines for specific presenting complaints and process redesign. Sixteen studies evaluated single-component interventions, with the following having at least one supportive study: using alternating patient assignment to provider teams rather than "zone"-based assignment, enhancing provider communication and customer service skills, incorporating information delivery interventions (e.g., pamphlets, video) that target patient expectations, using preformatted charts, and establishing ED-based observation units for specific conditions such as asthma and chest pain.
Conclusions: There is modest evidence supporting a range of performance improvement interventions for improving ED patient satisfaction. Further work is needed before specific, evidence-based recommendations can be made regarding which process changes are most effective. Recommendations are made for improving the quality of performance improvement efforts in the ED setting. 相似文献
14.
15.
颈椎后路螺钉-钛棒(板)内固定技术:初步临床报告 总被引:4,自引:1,他引:3
目的 报告利用螺钉-钛棒(板)固定技术治疗各种原因引起的颈椎不稳的初步临床结果。方法 作者1年来行颈椎后路螺钉-钛棒(板)技术内固定9例,其中齿突样骨引起的C1~C2不稳2例,手术后进行性颈椎后凸2例,颈椎管狭窄2例,C3-C4滑脱1例,C6~C7外伤滑脱2例。分别采用C1侧块、C2椎弓根螺钉、C3~C5侧块螺钉、C2-T2椎弓根螺钉植入技术,然后连接钛棒或钛板完成固定。9例病人共植入螺钉59枚。结果 所有病人在1周内带外支架进行活动,除1例因拒绝治疗死亡外,其余病人在1个月及1年后复查均未见内固定物移位。结论 颈椎后路螺钉-钛棒(板)固定为安全可靠的技术,可以术后即刻获得牢固内固定,为下一步治疗创造有利条件。 相似文献
16.
余甘子是一种具有较高的食用和药用价值的野生植物资源,风味独特,含有丰富的类SOD活性物质和其他多种具有生物活性的物质,具有清除自由基、抗肿瘤、抗衰老等保健作用。作者提出了余甘予保健口服液的生产工艺流程及配方,并采用改良的Marklund方法测定了类SOD的活力,结果较为满意。 相似文献
17.
对管碟法测定Nisin效价的条件进行了研究,考察了几个参数的影响,得出了Nisin测定的最佳条件:90mm培养皿中培养基加量为15mL,Na2HPO4·12H2O质量浓度1g/dL,菌悬液浓度109CFU/mL,琼脂质量浓度1g/dL,培养基pH值7.0,牛津杯中样品加液量100μL.在此条件下,Nisin效价在5~100IU/mL,其对数值与抑菌圈直径有较好的线性关系. 相似文献
18.
19.
20.
对50例神经根型颈椎病的CT征象进行了分析,并与X线平片加以比较。认为CT不仅在神经根型颈椎病的诊断中具有独特作用,而且在确定手术方法和手术途径的选择上也很有意义。作者认为在CT机还没有普及的情况下,摄一张良好的钩椎关节放大斜位片或椎间孔断层片对诊断神经根型颈椎病应是首选的。CT和X线平片相结合,综合分析,更有价值。 相似文献