全文获取类型
收费全文 | 703篇 |
免费 | 102篇 |
国内免费 | 7篇 |
专业分类
儿科学 | 20篇 |
妇产科学 | 23篇 |
基础医学 | 32篇 |
口腔科学 | 11篇 |
临床医学 | 90篇 |
内科学 | 61篇 |
皮肤病学 | 29篇 |
神经病学 | 45篇 |
特种医学 | 18篇 |
外科学 | 81篇 |
综合类 | 50篇 |
一般理论 | 3篇 |
预防医学 | 204篇 |
眼科学 | 16篇 |
药学 | 97篇 |
中国医学 | 19篇 |
肿瘤学 | 13篇 |
出版年
2024年 | 1篇 |
2023年 | 15篇 |
2022年 | 12篇 |
2021年 | 26篇 |
2020年 | 39篇 |
2019年 | 23篇 |
2018年 | 31篇 |
2017年 | 45篇 |
2016年 | 34篇 |
2015年 | 43篇 |
2014年 | 45篇 |
2013年 | 64篇 |
2012年 | 26篇 |
2011年 | 45篇 |
2010年 | 41篇 |
2009年 | 29篇 |
2008年 | 38篇 |
2007年 | 35篇 |
2006年 | 34篇 |
2005年 | 20篇 |
2004年 | 20篇 |
2003年 | 18篇 |
2002年 | 12篇 |
2001年 | 17篇 |
2000年 | 9篇 |
1999年 | 5篇 |
1998年 | 10篇 |
1997年 | 3篇 |
1996年 | 8篇 |
1995年 | 9篇 |
1994年 | 10篇 |
1993年 | 4篇 |
1992年 | 5篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 1篇 |
1988年 | 3篇 |
1987年 | 5篇 |
1986年 | 5篇 |
1985年 | 2篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1979年 | 2篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1975年 | 2篇 |
排序方式: 共有812条查询结果,搜索用时 448 毫秒
801.
Yvonne Kelly Niamh O’Rourke Rachel Flynn Josephine Hegarty Laura O’Connor 《The International journal of health planning and management》2023,38(1):40-52
Setting standards is a quality improvement mechanism and an important means for shaping the provision of health and social care services. Standards comprise statements describing a process or outcome of care. Setting standards is a global practice. It would be useful to have an understanding of the underpinning definitions of standards used internationally. Therefore, the aim of this review was to examine definitions of health and social care standards used internationally and identify similarities and differences. A targeted grey literature search of standard-setting bodies' websites and related health legislation was conducted to retrieve explicit definitions of standards. Of 15 standard-setting bodies that were searched, 12 definitions of standards were narratively synthesised. Terms that appeared in two or more of the definitions were extracted. Counts and percentages were calculated for these terms to determine magnitude of use. The commonalities among definitions included ‘quality’ (n = 6, 50%), ‘statements’ (n = 5, 42%), ‘performance’ (n = 5, 42%), and ‘measureable’ (n = 4, 33%). The less commonly used terms were ‘processes’ (n = 3, 25%), ‘set’ (n = 3, 25%), ‘evidence based’ (n = 2, 17%), ‘outcome’ (n = 2, 17%), ‘safe’ (n = 2, 17%), and ‘guidance’ (n = 2, 17%). Explicit definitions of standards were not retrieved from health legislation documents. Standard-setting bodies develop standards in the context of the health systems in which they are implemented; some are aspirational levels of quality, while others are minimum levels of quality. Researchers, standards developers and policy makers should be cognisant of this when comparing standards between countries. 相似文献
802.
Dimitrios Nikolaou 《Health economics》2023,32(1):107-133
Even though prior research has investigated the relationship between same-sex partnership recognition policies and health outcomes, the impact of same-sex marriage laws on sexually transmitted infections has not received much attention. Using state-level panel data from 2000 to 2019, I show that marriage equality legislation decreases the spread of (shorter-term) syphilis infections and of (longer-term) human immunodeficiency virus (HIV) and acquired immunodeficiency syndrome (AIDS) infections among the general population. Event study analyses correcting for non-staggered treatment implementation confirm these negative effects, but also suggest that standard difference-in-differences models understate the impact of the legislation by up to 8% points. Further analysis supports that these legislation effects operate through three mechanisms: increasing social tolerance, strengthening relationship commitment, and expanding health care access and coverage for HIV/AIDS prevention and treatment. Disaggregating the results by sexual behavior reveals that legal access to same-sex marriage leads to sizable decreases in AIDS rates among men who have sex with men (MSM) (the most at-risk population for an infection). Even though there is economically significant evidence that the legislation improves sexual health of the heterosexual population due to increased utilization of preventive sexual health care, the legislation does not have a direct impact on infection rates for the non-MSM population. 相似文献
803.
804.
805.
Benedikt Pulver Jan Riedel Folker Westphal Steven Luhn Torsten Schönberger Jan Schäper Volker Auwärter Anton Luf Michael Pütz 《Drug testing and analysis》2023,15(1):84-96
Synthetic cathinones comprise psychostimulants with desired effects like euphoria, increased vigilance, appetite suppression, and—mainly depending on certain structural features—entactogenic properties. 3,4-EtPV (1-(bicyclo[4.2.0]octa-1,3,5-trien-3-yl)-2-(pyrrolidin-1-yl)pentan-1-one) was first mentioned in an online drug forum in September 2021, where its imminent synthesis was announced. The goal was to produce a legal alternative to the phenylethylamines already banned by the German NpSG. In February and June 2022, two samples labeled with the name and molecular structure of 3,4-EtPV were analyzed. The molecular structure of the obviously mislabeled compound was elucidated and comprehensively characterized within the ADEBAR project. The synthetic cathinone identified differed from the declared 3,4-EtPV by a 3,4-propylene bridge instead of a 3,4-ethylene bridge and a piperidine ring instead of a pyrrolidine ring. The short name 3,4-Pr-PipVP (3,4-pr opylene-2-(1-pip eridinyl)v alerop henone) was suggested as a semisystematic name in collaboration with the European Monitoring Centre for Drugs and Drug Addiction. Herein, the results of the analyses are discussed and will enable forensic laboratories to update their databases quickly and identify 3,4-Pr-PipVP confidently. 3,4-Pr-PipVP is already scheduled under the German NpSG. This study highlights that there are ongoing efforts to deliberately circumvent generic definitions given, for example, in the German NpSG and that (unintentional?) mislabeling can be an issue. The end user purchasing substances online can never be sure that the material actually supplied will be the one ordered, and he might receive an illicit drug instead of an uncontrolled one. Furthermore, the purity is always unknown, creating health risks due to unexpected effects and potencies. 相似文献
806.
807.
PurposeIn the present study, the purpose was to determine the indications of pregnancy termination procedures that are performed before and after the limit of viability (between 10 and 22 weeks) in a tertiary center and to investigate the characteristics of the cases in which fetocide procedure was offered after the limit of viability (22 weeks and later). It also aimed to discuss the legal deadline for the fetocide procedure and legal aspect of pregnancy termination.Material and methodThe present study was conducted as a result of the retrospective examination of 198 cases who underwent pregnancy termination after the 10th week of pregnancy (the legal limit for voluntary termination of pregnancy in our country) in our clinic and met the study criteria. The cases were divided into two main groups as Early Termination (10–22 weeks) and Late Termination (22 weeks and later). The characteristics of these groups (i.e. reason for termination, termination week) and the characteristics of the cases in which fetocide procedure was performed and the cases that were not (i.e. termination week, reasons for termination) were compared.ResultsA total of 171 (86%) cases were under 22 weeks and 27 (14%) were 22 weeks or more. In the cases terminated early, the gestational week was found to be highest [20 + 1 (12+3–21 + 1)] in those with preterm premature rupture of membranes, and lowest in those with fetal gastrointestinal abnormalities. No statistically significant differences were detected between the termination reason and the gestational week in the late-terminated group, and also, although the termination week of 5 patients for whom the fetocide procedure was offered [median = 23 + 1 (22+4–26 + 0] was higher than the week of 22 patients for whom the fetocide procedure was not offered [median = 22 + 4 (22+1–25 + 4], the difference was not found to be statistically significant.ConclusionSince the majority of pregnancy terminations are performed before the viable period, the need for the fetocide procedure in pregnancy terminations is relatively low, and we think that this rate will decrease even more because the rate of early diagnosis of fetal anomalies increases as a result of developments in ultrasonographic imaging.Families who choose the termination of pregnancy search for other countries with appropriate legislation and the loss of time and the indecision of the family might cause the application of pregnancy termination after the viable period because of the limitations in the legal regulations of countries. 相似文献
808.
809.
目前,全国绝大多数地区已经制定中医药地方条例,并有不少地区做了多次修订,形成了一些立法亮点,主要体现于中医药特有领域的立法探索、安全合理用药监管机制的构建、中医药服务体系的健全、中医药宣传日的推广等方面,但仍有优化空间。此外,中医药地方立法仍有不少需要重点突破之处,如中医医术确有专长人员的扶持与管理、自种自采自用中药的监管、突发公共卫生事件的中医药参与机制等。通过对地方立法对贯彻《中医药法》的重要性、中医药地方立法亮点的梳理与评析和中医药地方立法重点的研判与思考进行归纳总结,为各地立法经验的互鉴及立法体例的完善提供借鉴。 相似文献
810.