全文获取类型
收费全文 | 64656篇 |
免费 | 4782篇 |
国内免费 | 343篇 |
专业分类
耳鼻咽喉 | 641篇 |
儿科学 | 1653篇 |
妇产科学 | 1564篇 |
基础医学 | 7984篇 |
口腔科学 | 1607篇 |
临床医学 | 6479篇 |
内科学 | 14706篇 |
皮肤病学 | 833篇 |
神经病学 | 5124篇 |
特种医学 | 1980篇 |
外国民族医学 | 2篇 |
外科学 | 9919篇 |
综合类 | 1063篇 |
现状与发展 | 1篇 |
一般理论 | 106篇 |
预防医学 | 5357篇 |
眼科学 | 1888篇 |
药学 | 4571篇 |
中国医学 | 144篇 |
肿瘤学 | 4159篇 |
出版年
2023年 | 284篇 |
2022年 | 442篇 |
2021年 | 1238篇 |
2020年 | 772篇 |
2019年 | 1074篇 |
2018年 | 1335篇 |
2017年 | 894篇 |
2016年 | 1010篇 |
2015年 | 1185篇 |
2014年 | 1834篇 |
2013年 | 2876篇 |
2012年 | 3887篇 |
2011年 | 4212篇 |
2010年 | 2426篇 |
2009年 | 2264篇 |
2008年 | 4081篇 |
2007年 | 4280篇 |
2006年 | 4092篇 |
2005年 | 4195篇 |
2004年 | 3888篇 |
2003年 | 3505篇 |
2002年 | 3464篇 |
2001年 | 750篇 |
2000年 | 641篇 |
1999年 | 737篇 |
1998年 | 759篇 |
1997年 | 615篇 |
1996年 | 499篇 |
1995年 | 496篇 |
1994年 | 467篇 |
1993年 | 447篇 |
1992年 | 543篇 |
1991年 | 517篇 |
1990年 | 427篇 |
1989年 | 444篇 |
1988年 | 401篇 |
1987年 | 381篇 |
1986年 | 363篇 |
1985年 | 425篇 |
1984年 | 439篇 |
1983年 | 397篇 |
1982年 | 532篇 |
1981年 | 444篇 |
1980年 | 488篇 |
1979年 | 306篇 |
1978年 | 325篇 |
1977年 | 322篇 |
1976年 | 263篇 |
1975年 | 291篇 |
1974年 | 249篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Objective
The aim of the study was to estimate the effect of the state-based reinsurance programs through the section 1332 State Innovation Waivers on health insurance marketplace premiums and insurer participation.Data Source
2015 to 2022 Robert Wood Johnson Foundation Health Insurance Exchange Compare Datasets.Study Design
An event study difference-in-differences (DD) model separately for each year of implementation and a synthetic control method (SCM) are used to estimate year-by-year effects following program implementation.Data Collection/Extraction Methods
Not applicable.Principal Findings
Reinsurance programs were associated with a decline in premiums in the first year of implementation by 10%–13%, 5%–19%, and 11%–17% for bronze, silver, and gold plans (p < 0.05). There is a trend of sustained declines especially for states that implemented their programs in 2019 and 2020. The SCM analyses suggest some effect heterogeneity across states but also premium declines across most states. There is no evidence that reinsurance programs affected insurer participation.Conclusion
State-based reinsurance programs have the potential to improve the affordability of health insurance coverage. However, reinsurance programs do not appear to have had an effect on insurer participation, highlighting the need for policy makers to consider complementary strategies to encourage insurer participation. 相似文献2.
Rajendrababu Sharmila Puthuran George Varghese Alia Laxmi Ananya Uduman Mohammed Sithiq Wijesinghe Hiruni Kaushalya 《International ophthalmology》2022,42(8):2609-2618
International Ophthalmology - To investigate the efficacy and safety of non-valved Aurolab aqueous drainage implant (AADI) surgery combined with phacoemulsification in eyes with refractory glaucoma... 相似文献
3.
4.
5.
6.
7.
Yasmine Yousef Etienne St-Louis Robert Baird Emily R. Smith Elena Guadagno Dickens St-Vil Dan Poenaru 《Journal of pediatric surgery》2019,54(4):831-837
Background
The Lancet Commission on Global Surgery highlighted global surgical need but offered little insight into the specific surgical challenges of children in low-resource settings. Efforts to strengthen the quality of global pediatric surgical care have resulted in a proliferation of partnerships between low-and middle-income countries (LMICs) and high-income countries (HICs). Standardized tools able to reliably measure gaps in delivery and quality of care are important aids for these partnerships. We undertook a systematic review (SR) of capacity assessment tools (CATs) focused on needs assessment in pediatric surgery.Methods
A comprehensive search strategy of multiple electronic databases was conducted per PRISMA guidelines without linguistic or temporal restrictions. CATs were selected according to pre-defined inclusion criteria. Articles were assessed by two independent reviewers. Methodological quality of studies was appraised using the COSMIN checklist with 4-point scale.Results
The search strategy generated 16,641 original publications, of which three CATs were deemed eligible. Eligible tools were either excessively detailed or oversimplified. None used weighted scores to identify finer granularity between institutions. No CATs comprehensively included measures of resources, outcomes, accessibility/impact and training.Discussion
The results of this study identify the need for a CAT capable of objectively measuring key aspects of surgical capacity and performance in a weighted tool designed for pediatric surgical centers in LMICs.Type of Study
Systematic Review.Level of Evidence
II. 相似文献8.
9.
10.