全文获取类型
收费全文 | 8725篇 |
免费 | 921篇 |
国内免费 | 436篇 |
专业分类
耳鼻咽喉 | 28篇 |
儿科学 | 133篇 |
妇产科学 | 51篇 |
基础医学 | 423篇 |
口腔科学 | 142篇 |
临床医学 | 609篇 |
内科学 | 1253篇 |
皮肤病学 | 99篇 |
神经病学 | 503篇 |
特种医学 | 87篇 |
外科学 | 416篇 |
综合类 | 1337篇 |
现状与发展 | 1篇 |
预防医学 | 1081篇 |
眼科学 | 59篇 |
药学 | 2109篇 |
4篇 | |
中国医学 | 1549篇 |
肿瘤学 | 198篇 |
出版年
2024年 | 22篇 |
2023年 | 147篇 |
2022年 | 218篇 |
2021年 | 384篇 |
2020年 | 368篇 |
2019年 | 378篇 |
2018年 | 298篇 |
2017年 | 359篇 |
2016年 | 328篇 |
2015年 | 294篇 |
2014年 | 547篇 |
2013年 | 762篇 |
2012年 | 655篇 |
2011年 | 697篇 |
2010年 | 503篇 |
2009年 | 388篇 |
2008年 | 346篇 |
2007年 | 417篇 |
2006年 | 378篇 |
2005年 | 305篇 |
2004年 | 293篇 |
2003年 | 256篇 |
2002年 | 219篇 |
2001年 | 159篇 |
2000年 | 148篇 |
1999年 | 108篇 |
1998年 | 121篇 |
1997年 | 125篇 |
1996年 | 97篇 |
1995年 | 87篇 |
1994年 | 77篇 |
1993年 | 55篇 |
1992年 | 51篇 |
1991年 | 55篇 |
1990年 | 45篇 |
1989年 | 28篇 |
1988年 | 29篇 |
1987年 | 24篇 |
1986年 | 20篇 |
1985年 | 50篇 |
1984年 | 33篇 |
1983年 | 29篇 |
1982年 | 43篇 |
1981年 | 26篇 |
1980年 | 27篇 |
1979年 | 15篇 |
1978年 | 11篇 |
1977年 | 15篇 |
1976年 | 16篇 |
1975年 | 11篇 |
排序方式: 共有10000条查询结果,搜索用时 109 毫秒
1.
《Research in social & administrative pharmacy》2022,18(9):3694-3698
In this paper, we argue that understanding and addressing the problem of poor-quality medical products requires a more interdisciplinary approach than has been evident to date. While prospective studies based on rigorous standardized methodologies are the gold standard for measuring the prevalence of poor-quality medical products and understanding their distribution nationally and internationally, they should be complemented by social science research to unpack the complex set of social, economic, and governance factors that underlie these patterns. In the following sections, we discuss specific examples of prospective quality surveys and of social science studies, highlighting the value of cross-sector partnerships in driving high-quality, policy-relevant research in this area. 相似文献
2.
This study is focussed on micro-encapsulation of essential oils in polylactic acid (PLA) and a poly(methyl methacrylate) (PMMA) matrix as well as blends of the same. Microspheres were prepared by the solvent evaporation technique and characterised by scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and Fourier transform infra-red spectroscopy (FTIR). The encapsulation efficiencies and release profiles of the essential oils were studied by gas chromatography mass spectrometry (GC-MS) and head-space solid-phase microextraction GC-MS, respectively. Furthermore, the microspheres were tested for antibacterial activity against both Gram-negative and Gram-positive bacterial strains.
The results showed that the microspheres compositions (PLA/PMMA ratio) have significant effect on their characteristics. The process adopted for preparing the microspheres promoted formation of spherical particles at the sizes of 1.5–9.5?µm. The highest encapsulation efficiency of the prepared microspheres was observed in systems consisting of linalool (81.10?±?10.0?wt. % for PLA system and 76.0?±?3.3?wt. % for PMMA system). Confirmation was also made that the release rate of the microspheres was affected by the size of the same. 相似文献
3.
“络病学说”作为重要的中医基础病机之一,近年来被广泛应用于肿瘤类疾病的临床诊疗中,其对于肿瘤的发生发展以及转移等机制研究与治疗均有理论指导意义。“络病”在形态与功能上与现代医学中的肿瘤微血管、微循环概念相似;瘀阻络脉与肿瘤患者血液高凝状态类似,故运用“通络法”抗肿瘤具有充足的理论依据。虫类药是动物药的别称,作为通络药的代表,善于搜刮剔络,在肿瘤的防治中起到了活血化瘀通络、攻毒散结通络、搜风解毒通络以及补益培本通络等作用。通过梳理“络病学说”的起源、发展与成熟阶段的主要思想内涵,整理并总结现代肿瘤治疗中“络病学说”的相关研究与应用,并分析虫类药在通络法中的具体应用,以期为开展中医络病防治肿瘤的临床应用提供理论依据。 相似文献
4.
功能性便秘的发生严重困扰着现代人群,进而影响人们的生活质量。杜长海名老中医认为功能性便秘究其内因为大肠传导失常,外因乃现代人的生活方式、紧张的生活氛围等等,因此杜老结合自己数十年的临床经验,根据中医辨证总结出临床常用药对,对有效治疗功能性便秘进行了经验总结。 相似文献
5.
The association between family affluence and smoking among 15‐year‐old adolescents in 33 European countries,Israel and Canada: the role of national wealth 下载免费PDF全文
6.
《Journal of the American Medical Directors Association》2020,21(3):439.e9-439.e13
Background/ObjectivesPolypharmacy and multimorbidity is a threat to older people; hence, listing approaches should support physicians to optimize medication. The FORTA (Fit fOR The Aged) classification of drug appropriateness for older people provides positive or negative labels: A (A-bsolutely), B (B-eneficial), C (C-areful), and D (D-on't). Based on these categories, FORTA-labeled drug lists were developed in 7 European countries or regions; the same approach was used to develop a U.S.-FORTA List reflecting the country-specific availability and usage of drugs.Design/SettingA 2-step Delphi-type approach was employed to add, remove, or relabel drugs from the listing proposal and to add or remove new indications. The proposal utilized the European (EURO)-FORTA list as template.ParticipantsEight US-based geriatricians/pharmacists served as raters. Measurements: Raters gave recommendations and comments on the list items.ResultsThe first U.S.-FORTA List contains 273 items aligned to 27 main indication groups; 30 drugs and drug groups were added, and 23 removed as being unavailable in the United States. The highest percentage of changes in FORTA labels as compared to the EURO-FORTA List occurred for sleep disorders associated with dementia (40%). In 8 indications, the labels for 11 items were different from the proposal. Thus, for the majority of the items (n = 232, 95.5%), the proposals were accepted by the US raters. Only 16 (6.6%) of the proposed items (n = 243) had to be re-evaluated in the second round as a result of inconsistent rating in the first round.Conclusions and ImplicationsThe U.S.-FORTA List addresses the appropriateness of drugs for older people in the United States reflecting country-specific availability, usage, and expert rating. As shown for the FORTA list in Europe, this listing approach is among the few that are clinically validated and improve well-being and geriatric outcomes. The U.S.-FORTA List now largely enhances the global availability of this approach. 相似文献
7.
8.
Luis Miguel Azogil-López Juan José Pérez-Lázaro Patricia Ávila-Pecci Esther María Medrano-Sánchez María Valle Coronado-Vázquez 《Atencion primaria / Sociedad Espa?ola de Medicina de Familia y Comunitaria》2019,51(5):278-284
Aim
The purpose of this study is to find out whether telephone referral from Primary Health Care to Internal Medicine Consult manages to reduce waiting days as compared to traditional referral. This study also aims to know how acceptable is the telephone referral to general practitioners and their patients.Design
No blind randomized controlled clinical trial.Setting
Northern Huelva Health District.Participants
154 patients.Interventions
Patients referrals from intervention clinicians were sent via telephone consultation, whereas patients referrals from control clinicians were sent by traditional via.Measurements
Number of days from referral request to Internal Medicine Consult. Number of telephone and traditional referrals. Number of doctors and patients denied. Denial reasons.Results
A statistically significant difference was found between groups, with an average of 27 (21-34) days. Among General Practitioners, 8 of the first 58 total doctors after randomization and, subsequently, 6 of the 20 doctors of the test group refused to engage in the trial because they considered “excessive time and effort consuming”. 50% of patients referred by the 14 General Practitioners finally randomized to the intervention group were denied referral by telephone due to patient's complexity.Conclusions
Telephone referral significantly reduces waiting days for Internal Medicine consult. This type of referral did not mean an “excessive time and effort consuming” to General Practitioners and was not all that beneficial to complex patients 相似文献9.
10.
Improving oral health: current considerations 总被引:1,自引:0,他引:1
S. Ciancio 《Journal of clinical periodontology》2003,30(S5):4-6