全文获取类型
收费全文 | 23621篇 |
免费 | 727篇 |
国内免费 | 134篇 |
专业分类
耳鼻咽喉 | 183篇 |
儿科学 | 772篇 |
妇产科学 | 432篇 |
基础医学 | 1548篇 |
口腔科学 | 346篇 |
临床医学 | 1531篇 |
内科学 | 5620篇 |
皮肤病学 | 423篇 |
神经病学 | 774篇 |
特种医学 | 953篇 |
外科学 | 2855篇 |
综合类 | 2808篇 |
一般理论 | 1篇 |
预防医学 | 1220篇 |
眼科学 | 200篇 |
药学 | 1246篇 |
10篇 | |
中国医学 | 3111篇 |
肿瘤学 | 449篇 |
出版年
2024年 | 35篇 |
2023年 | 150篇 |
2022年 | 329篇 |
2021年 | 743篇 |
2020年 | 470篇 |
2019年 | 2676篇 |
2018年 | 2114篇 |
2017年 | 1287篇 |
2016年 | 338篇 |
2015年 | 332篇 |
2014年 | 1069篇 |
2013年 | 876篇 |
2012年 | 1022篇 |
2011年 | 808篇 |
2010年 | 729篇 |
2009年 | 570篇 |
2008年 | 473篇 |
2007年 | 436篇 |
2006年 | 402篇 |
2005年 | 309篇 |
2004年 | 203篇 |
2003年 | 208篇 |
2002年 | 155篇 |
2001年 | 151篇 |
2000年 | 104篇 |
1999年 | 70篇 |
1998年 | 62篇 |
1997年 | 46篇 |
1996年 | 28篇 |
1995年 | 56篇 |
1994年 | 45篇 |
1993年 | 14篇 |
1992年 | 14篇 |
1991年 | 12篇 |
1989年 | 11篇 |
1988年 | 15篇 |
1986年 | 9篇 |
1985年 | 613篇 |
1984年 | 1020篇 |
1983年 | 785篇 |
1982年 | 778篇 |
1981年 | 768篇 |
1980年 | 703篇 |
1979年 | 695篇 |
1978年 | 618篇 |
1977年 | 411篇 |
1976年 | 521篇 |
1975年 | 428篇 |
1974年 | 412篇 |
1973年 | 337篇 |
排序方式: 共有10000条查询结果,搜索用时 21 毫秒
1.
Heather L. Brown 《Journal of emergency nursing》2021,47(2):321-325
The coronavirus 2019 pandemic has affected almost every aspect of health care delivery in the United States, and the emergency medicine system has been hit particularly hard while dealing with this public health crisis. In an unprecedented time in our history, medical systems and clinicians have been asked to be creative, flexible, and innovative, all while continuing to uphold the important standards in the US health care system. To continue providing quality services to patients during this extraordinary time, care providers, organizations, administrators, and insurers have needed to alter longstanding models and procedures to respond to the dynamics of a pandemic. The Emergency Medicine Treatment and Active Labor Act of 1986, or EMTALA, is 1 example of where these alterations have allowed health care facilities and clinicians to continue their work of caring for patients while protecting both the patients and the clinicians themselves from infectious exposures at the same time. 相似文献
2.
3.
Sports Imaging has dramatically increased in the past decade with increasing number of adolescents, young and middle-aged adults participating in non-competitive/hobby sports. Therefore, sports injuries are no longer confined to elite athletes. Furthermore, newer forms of sports such as mountain climbing, pickle ball and curling etc. are gaining popularity. Majority of the injuries in sports medicine are from musculoskeletal trauma. Therefore, it is imperative that the musculoskeletal radiologist becomes familiar with various sports related injury patterns as these are commonly encountered in daily practice. This update aims to briefly encapsulate the major aspects of sports imaging. It includes the imaging manifestations of various types of musculoskeletal injuries on different modalities (commonly US and MRI) and briefly mentions the various image guided interventions, performed both on the sports field and in the hospital setting. 相似文献
4.
《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
5.
《Vaccine》2022,40(7):1001-1009
Vaccination guidelines for dogs and cats indicate that core vaccines (for dogs, rabies, distemper, adenovirus, parvovirus; for cats, feline parvovirus, herpes virus-1, calicivirus) are essential to maintain health, and that non-core vaccines be administered according to a clinician’s assessment of a pet’s risk of exposure and susceptibility to infection. A reliance on individual risk assessment introduces the potential for between-practice inconsistencies in non-core vaccine recommendations. A study was initiated to determine non-core vaccination rates of dogs (Leptospira, Borrelia burgdorferi, Bordetella bronchiseptica, canine influenza virus) and cats (feline leukemia virus) in patients current for core vaccines in veterinary practices across the United States. Transactional data for 5,531,866 dogs (1,670 practices) and 1,914,373 cats (1,661 practices) were retrieved from practice management systems for the period November 1, 2016 through January 1, 2020, deidentified and normalized. Non-core vaccination status was evaluated in 2,798,875 dogs and 788,772 cats that were core-vaccine current. Nationally, median clinic vaccination rates for dogs were highest for leptospirosis (70.5%) and B. bronchiseptica (68.7%), and much lower for canine influenza (4.8%). In Lyme-endemic states, the median clinic borreliosis vaccination rate was 51.8%. Feline leukemia median clinic vaccination rates were low for adult cats (34.6%) and for kittens and 1-year old cats (36.8%). Individual clinic vaccination rates ranged from 0 to 100% for leptospirosis, B. bronchiseptica and feline leukemia, 0–96% for canine influenza, and 0–94% for borreliosis. Wide variation in non-core vaccination rates between clinics in similar geographies indicates that factors other than disease risk are driving the use of non-core vaccines in pet dogs and cats, highlighting a need for veterinary practices to address gaps in patient protection. Failure to implement effective non-core vaccination strategies leaves susceptible dogs and cats unprotected against vaccine-preventable diseases. 相似文献
6.
7.
8.
《Journal of Science and Medicine in Sport》2020,23(9):836-840
ObjectivesThis study primarily aimed to explore injury incidence rates in the three main domestic competition formats in England and Wales (First-Class, One-Day and Twenty20 [T20]). For the first time, the study also describes the epidemiology of elite men’s domestic cricket injuries across nine seasons (2010–2018 inclusive).DesignProspective cohort analysis.MethodsInjury incidence and prevalence from all injuries calculated according to the updated international consensus statement on injury surveillance in cricket, with statistical process control charts (SPC) used to detect trends in the data.ResultsThe average match injury incidence was 102 injuries/1000 days of play, with highest incidence in One-Day (254 injuries/1000 days of play), followed by T20 (136 injuries/1000 days of play) and First-Class Cricket (68 injuries/1000 days of play). Most match injuries were sustained during bowling (41.6 injuries/1000 days of play), followed by fielding (26.8 injuries/1000 days of play) and batting (22.3 injuries/1000 days of play). The thigh was the body area most commonly injured (7.4 injuries/100 players per season), with lumbar spine injuries the most prevalent (1.3% of players unavailable on any given day during the season). On average, 7.5% of players were unavailable on any given day during the domestic season when all injuries were considered (match and training). The SPC charts showed relatively consistent match injury incidence for all competitions, reproduced across all nine seasons.ConclusionThese findings provide a robust empirical base for the extent of the injury problem in domestic cricket played in England and Wales, with similar injury profiles across the three formats. 相似文献
9.