全文获取类型
收费全文 | 58326篇 |
免费 | 4316篇 |
国内免费 | 1656篇 |
专业分类
耳鼻咽喉 | 452篇 |
儿科学 | 1281篇 |
妇产科学 | 2242篇 |
基础医学 | 6360篇 |
口腔科学 | 1227篇 |
临床医学 | 5579篇 |
内科学 | 5803篇 |
皮肤病学 | 793篇 |
神经病学 | 3934篇 |
特种医学 | 1615篇 |
外国民族医学 | 7篇 |
外科学 | 4347篇 |
综合类 | 8773篇 |
一般理论 | 8篇 |
预防医学 | 6126篇 |
眼科学 | 1651篇 |
药学 | 6969篇 |
80篇 | |
中国医学 | 4619篇 |
肿瘤学 | 2432篇 |
出版年
2023年 | 856篇 |
2022年 | 1114篇 |
2021年 | 1850篇 |
2020年 | 2006篇 |
2019年 | 1903篇 |
2018年 | 1788篇 |
2017年 | 1858篇 |
2016年 | 1783篇 |
2015年 | 1678篇 |
2014年 | 3333篇 |
2013年 | 4262篇 |
2012年 | 3333篇 |
2011年 | 3739篇 |
2010年 | 2956篇 |
2009年 | 2696篇 |
2008年 | 2711篇 |
2007年 | 2745篇 |
2006年 | 2447篇 |
2005年 | 2217篇 |
2004年 | 1912篇 |
2003年 | 1876篇 |
2002年 | 1432篇 |
2001年 | 1375篇 |
2000年 | 1077篇 |
1999年 | 966篇 |
1998年 | 758篇 |
1997年 | 753篇 |
1996年 | 679篇 |
1995年 | 791篇 |
1994年 | 665篇 |
1993年 | 581篇 |
1992年 | 542篇 |
1991年 | 478篇 |
1990年 | 497篇 |
1989年 | 424篇 |
1988年 | 313篇 |
1987年 | 274篇 |
1986年 | 323篇 |
1985年 | 439篇 |
1984年 | 421篇 |
1983年 | 261篇 |
1982年 | 335篇 |
1981年 | 276篇 |
1980年 | 289篇 |
1979年 | 213篇 |
1978年 | 178篇 |
1977年 | 168篇 |
1976年 | 159篇 |
1975年 | 112篇 |
1974年 | 90篇 |
排序方式: 共有10000条查询结果,搜索用时 23 毫秒
1.
[目的] 探讨《金匮要略·痉湿暍病脉证并治第二》“纳药鼻中”之“药”所指的具体方药。[方法] 从历代注家注疏入手,对不同观点进行源流上的梳理。同时,通过文字学考证,对“药”字在古汉语中的含义展开探讨。[结果] 对于“纳药鼻中”之“药”,历代注家观点大致可归纳为三类,即随文注解、认为“药”为具有某些特性的药物、认为“药”为瓜蒂散或其类方,其中认为“纳瓜蒂于鼻中”的观点流传较广。通过文字学考证,“药”在楚方言中有指代“白芷”之意,“纳药鼻中”即是“纳白芷于鼻中”,白芷治疗鼻病也为历代医家所习用。[结论] “纳瓜蒂于鼻中”与“纳白芷于鼻中”两种观点都具有一定证据支持,但从文献学角度和仲景书体例而言,“纳药鼻中”原意应为“纳白芷于鼻中”。 相似文献
2.
3.
《Research in social & administrative pharmacy》2022,18(8):3284-3289
BackgroundAdverse drug reactions (ADRs) and adverse drug events (ADEs) in older people contribute to a significant proportion of hospital admissions and are common following discharge. Effective interventions are therefore required to combat the growing burden of preventable ADRs. The Prediction of Hospitalisation due to Adverse Drug Reactions in Elderly Community Dwelling Patients (PADR-EC) score is a validated risk score developed to assess the risk of ADRs in people aged 65 years and older and has the potential to be utilised as part of an intervention to reduce ADRs.ObjectivesThis trial was designed to investigate the effectiveness of an intervention to reduce ADR incidence in older people and to obtain further information about ADRs and ADEs in the 12–24 months following hospital discharge.MethodsThe study is an open-label randomised-controlled trial to be conducted at the Royal Hobart Hospital, a 500-bed public hospital in Tasmania, Australia. Community-dwelling patients aged 65 years and older with an unplanned overnight admission to a general medical ward will be recruited. Following admission, the PADR-EC ADR score will be calculated by a research pharmacist, with the risk communicated to clinicians and discussed with participants. Following discharge, nominated general practitioners and community pharmacists will receive the risk score and related medication management advice to guide their ongoing care of the patient. Follow-up with participants will occur at 3 and 12 and 18 and 24 months to identify ADRs and ADEs. The primary outcome is moderate-severe ADRs at 12 months post-discharge, and will be analysed using the cumulative incidence proportion, survival analysis and Poisson regression.SummaryIt is hypothesised that the trial will reduce ADRs and ADEs in the intervention population. The study will also provide valuable data on post-discharge ADRs and ADEs up to 24 months post-discharge. 相似文献
4.
目的探讨口腔鳞状细胞癌(OSCC)组织中长链非编码RNA(lncRNA)淋巴细胞白血病缺失基因1(DLEU1)的表达及与临床病理参数和预后的关系。 方法收集2017年1月至2017年12月南通大学附属医院保存的98例OSCC组织及癌旁组织,实时荧光定量-聚合酶链式反应(qRT-PCR)检测癌组织和癌旁组织中lncRNA DLEU1表达。分析lncRNA DLEU1表达与OSCC患者临床病理参数的关系,K-M法绘制不同lncRNA DLEU1表达OSCC患者生存曲线,多因素Cox回归分析OSCC患者预后不良影响因素。 结果OSCC组织中lncRNA DLEU1表达(1.863±0.572)高于癌旁组织(1.058±0.211)(t=13.058,P<0.001)。lncRNA DLEU1表达与OSCC患者肿瘤区域淋巴结转移(TNM)分期、淋巴结转移有关(P<0.05)。中位随访26个月,lncRNA DLEU1≥1.863生存率为61.22%,低于lncRNA DLEU1<1.863的79.59%(Log-rank χ2=4.819,P=0.028)。TNM分期Ⅲ~Ⅳ期(HR=4.612,95%CI:1.482~11.352)、淋巴结转移(HR=4.370,95%CI:1.442~10.246)、lncRNA DLEU1≥1.863(HR=4.231,95%CI:1.350~10.260)是OSCC患者预后不良的独立风险因素(P<0.05)。 结论OSCC组织中lncRNA DLEU1高表达,与TNM分期、淋巴结转移和预后相关,可能成为新的OSCC诊治和预后分子标志物。 相似文献
5.
AimThis study aimed to develop and examine the psychometric properties of validity and reliability of the Core Competence in Fundamental Nursing Practicum Scale.BackgroundFundamental nursing practicum is an initial practicum required for nursing students; however, no measurement tool is available to assess students’ core competence during their first practicum.DesignCross-sectional design.MethodsNursing students from six nursing colleges in Southern Taiwan who completed their fundamental nursing practicum within 1 month were recruited. The initial 39-item Core Competence in Fundamental Nursing Practicum Scale was drafted and examined for its content, face and factorial validity. The data were randomly assigned into two subgroups and analyzed using exploratory and confirmatory factor analyses. Exploratory factor analysis was performed using principal-axis factoring and direct oblimin rotation and numbers of factors were extracted on the basis of eigenvalues > 1 and a scree plot. The exploratory factor analysis derived structure was then verified by a confirmatory factor analysis using maximum likelihood estimation. Reliability was examined in term of internal consistency.ResultsThe exploratory factor analysis and confirmatory factor analysis samples comprised 405 and 513 students, respectively. Four items were omitted by content validity and another four items were omitted because of the ceiling effect. Six items were removed during the exploratory factor analysis because of their lower factor loadings (< 0.4). The final 25-item Core Competence in Fundamental Nursing Practicum Scale comprised 5 domains, namely communication (3 items), application of nursing process (6 items), basic biomedical science (4 items), nursing skills and ability to perform a care process (7 items), and professional attitude (5 items), which collectively explained 70.14% of total variance. The structure was then verified by a confirmatory factor analysis with satisfactory model fit. The Cronbach’s alpha of the Core Competence in Fundamental Nursing Practicum Scale was 0.94.ConclusionsThe 25-item Core Competence in Fundamental Nursing Practicum Scale reliably and validly measures nursing students’ core competence during their fundamental nursing practicum. Instructors can use the scale to identify students’ weak core competencies and refine their courses for novice nurses. 相似文献
6.
《Journal of Cardiovascular Computed Tomography》2022,16(6):517-523
BackgroundSelection of the transcatheter heart valve size for a mitral valve-in-valve procedure is based on the type and manufacturer’s labelled size. However, accurate information of surgical heart valve (SHV) size may not be available in the patient’s medical record. The purpose of this study is to establish reference data for computed tomography (CT) dimensions of commonly used mitral SHV in order to determine the manufacturer’s labelled size from a cardiac CT data set.MethodsCT datasets of 105 patients with surgical mitral bioprosthesis and available manufacturer labeled datasets were included in the analysis. CT derived valve dimensions were assessed by two observers using multiplanar reformats aligned with the basal sewing ring. A circular region of interest was used in a standardized fashion to minimize influence of image acquisition and reconstruction parameters. Interobserver variability was assessed by Bland-Altman analysis.ResultsThe CT-derived dimensions were stratified by valve size and type, and SHV properties were demonstrated for 5 common valve types. Variability of measurements was small and inter-observer limits of agreement were narrow. Stratified by SHV type, no overlap was noted for CT-derived dimensions among different SHV sizes . A reference table of CT characteristics of surgical mitral bioprosthesis types was created.ConclusionThe study provides reference CT data for determining the manufacturers’ labeled SHV size across a range of commonly used mitral SHVs. The findings will be important to help identify types of surgical mitral bioprosthesis utilizing CT characteristics for patients without SHV size documentation. 相似文献
7.
8.
周杨 《中国现代药物应用》2022,(2)
目的探讨小儿肠胃康颗粒联合酪酸梭菌活菌散治疗小儿消化不良性腹泻的临床疗效及安全性。方法104例小儿消化不良性腹泻患儿,依据随机抽签法分为对照组与观察组,各52例。对照组采用小儿肠胃康颗粒治疗,观察组采用小儿肠胃康颗粒联合酪酸梭菌活菌散治疗。对比两组症状改善时间、治疗效果及不良反应发生情况。结果观察组腹泻、腹部疼痛及食欲下降改善时间分别为(1.93±1.05)、(2.05±1.06)、(2.47±1.04)d,均短于对照组的(4.88±1.49)、(3.62±1.55)、(3.63±1.15)d,差异有统计学意义(P<0.05)。观察组治疗总有效率为94.23%,高于对照组的76.92%,差异有统计学意义(P<0.05)。观察组不良反应发生率为1.92%,低于对照组的13.46%,差异有统计学意义(P<0.05)。结论小儿肠胃康颗粒联合酪酸梭菌活菌散治疗小儿消化不良性腹泻疗效显著,且安全性较高,值得临床合理推行实践。 相似文献
9.
《Research in social & administrative pharmacy》2022,18(3):2367-2391
ObjectivesSeveral implementation strategies can reduce potentially inappropriate medication (PIM) prescribing. Although use of PIMs has declined in recent years, it remains prevalent. Various strategies exist to improve the appropriateness of medication use. However, little is known about the processes of these different implementation strategies. This scoping review aims to investigate how the process evaluation of implementation strategies for reducing PIM prescribing in the older population has been studied.MethodsWe searched for process evaluations of implementation strategies for reducing PIM prescribing in PUBMED, SCOPUS and Web of Science published between January 2000 and November 2019 in English. We applied the following inclusion criteria: patients aged ≥65 years, validated PIM criteria, and implementation process evaluated. The review focuses on decision support for health care professionals. We described the findings of the process evaluations, and compared the authors’ concepts of process evaluation of the included publications to those of Proctor et al.( 2010).ResultOf 9131 publications screened, 29 met our inclusion criteria. Different process evaluation conceptualizations were identified. Most process evaluations took place in the initial stages of the process (acceptability, adoption, appropriateness, and feasibility) and sustainability and implementation costs were seldom evaluated. None of the included publications evaluated fidelity.Multifaceted interventions were the most studied implementation strategies. Medication review was more common in acceptability evaluations, multidisciplinary interventions in adoption evaluations, and computerized systems and educational interventions in feasibility evaluations. Process evaluations were studied from the health care professionals’ viewpoint in most of the included publications, but the management viewpoint was missing.DiscussionThe conceptualization of process evaluation in the field of PIM prescribing is indeterminate. There is also a current gap in the knowledge of sustainability and implementation costs. Clarifying the conceptualization of implementation process evaluation is essential in order to effectively translate research knowledge into practice. 相似文献
10.