全文获取类型
收费全文 | 254286篇 |
免费 | 21598篇 |
国内免费 | 6024篇 |
专业分类
耳鼻咽喉 | 3659篇 |
儿科学 | 5082篇 |
妇产科学 | 4125篇 |
基础医学 | 20319篇 |
口腔科学 | 8710篇 |
临床医学 | 24992篇 |
内科学 | 30444篇 |
皮肤病学 | 3518篇 |
神经病学 | 12935篇 |
特种医学 | 7651篇 |
外国民族医学 | 11篇 |
外科学 | 23737篇 |
综合类 | 40548篇 |
现状与发展 | 18篇 |
一般理论 | 28篇 |
预防医学 | 32914篇 |
眼科学 | 2868篇 |
药学 | 23355篇 |
373篇 | |
中国医学 | 27135篇 |
肿瘤学 | 9486篇 |
出版年
2024年 | 697篇 |
2023年 | 4848篇 |
2022年 | 8176篇 |
2021年 | 12596篇 |
2020年 | 12002篇 |
2019年 | 13093篇 |
2018年 | 11894篇 |
2017年 | 10183篇 |
2016年 | 9372篇 |
2015年 | 8758篇 |
2014年 | 17432篇 |
2013年 | 17834篇 |
2012年 | 15348篇 |
2011年 | 16532篇 |
2010年 | 13293篇 |
2009年 | 11726篇 |
2008年 | 11049篇 |
2007年 | 11016篇 |
2006年 | 9394篇 |
2005年 | 8070篇 |
2004年 | 6597篇 |
2003年 | 5902篇 |
2002年 | 4586篇 |
2001年 | 3957篇 |
2000年 | 3434篇 |
1999年 | 2764篇 |
1998年 | 2281篇 |
1997年 | 2040篇 |
1996年 | 1613篇 |
1995年 | 1626篇 |
1994年 | 1464篇 |
1993年 | 1224篇 |
1992年 | 1166篇 |
1991年 | 1057篇 |
1990年 | 898篇 |
1989年 | 898篇 |
1988年 | 829篇 |
1987年 | 737篇 |
1986年 | 661篇 |
1985年 | 1934篇 |
1984年 | 2224篇 |
1983年 | 1420篇 |
1982年 | 1828篇 |
1981年 | 1309篇 |
1980年 | 1100篇 |
1979年 | 1022篇 |
1978年 | 827篇 |
1977年 | 634篇 |
1976年 | 770篇 |
1975年 | 550篇 |
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
91.
92.
93.
There is increasing public interest in natural or herbal-based healthcare products. This trend is not only visible in supermarkets and dental practices, but also in the scientific world. An improving number of clinical trials are being conducted to validate the claims made about these products in regards to periodontal health. Among single component preparations, Aloe vera and green tea are the most studied natural ingredients. Concerning polyherbal mixtures, triphala has garnered great interest. The effects of these natural products on periodontal health is encouraging, with almost all studies showing an inhibitory effect on plaque accumulation and an improvement in gingival health. However, more studies are needed to be able to design clinical guidelines to guide the use of these natural products in periodontal practice. For most of these products, few studies are available and, moreover, the available studies are limited in duration, the number of participants, and the specific composition of the natural product is often not described in detail. 相似文献
94.
95.
目的本文主要研究和探讨护理干预对放疗科头颈部肿瘤放疗患者生活质量的影响。方法将我院2017年2月份至2018年10月份收治的100例头颈部肿瘤放疗患者作为本次研究的对象,在随机原则的指导下把100例患者分为对照组和实验组,每组患者的数量为50例。对照组患者给予常规护理,实验组患者实施护理干预,对两组患者的生活质量、睡眠质量、护理满意度和护理依从性等进行对比分析。结果在生活质量、睡眠质量、护理满意度和护理依从性等方面,组间进行对比分析,实验组都明显优于对照组,P<0.05差异具有统计学意义。结论对头颈部肿瘤放疗患者实施护理干预可以让患者的生活质量、睡眠质量、护理依从性以及护理满意度等都得到显著的改善,从而让患者以一种积极、乐观的心态接受放疗,这对于放疗效果的提高具有重要的作用。总之,这一护理模式应该在临床中进行推广和使用。 相似文献
96.
97.
《Revue d'épidémiologie et de santé publique》2020,68(2):109-115
BackgroundDuring their training, students in osteopathy regularly undergo spinal manipulation exercises. This exposes the students’ spine to unskilled gestures performed by their colleagues learning spinal manipulation. Discomfort, muscle soreness or moderate pain following spinal manipulations lasting two or three days are commonly reported. In addition, some students may have ongoing spinal musculoskeletal disease (SMSD) during their studies. The purpose of this study was to evaluate the prevalence of SMSDs and their maximum intensity in a population of osteopathy students and to determine whether individual differences exist.MethodAn exploratory cross-sectional study took place over three years. Data were collected by means of a self-administrated standardised questionnaire screening for MSD: the Nordic questionnaire.ResultsThere were 733 exploitable questionnaires, giving an average response rate of 91.5%. Average prevalence of SMSD was 98.4% during the last 12 months. Average maximum intensity perceived was 6/10 and 45% of students experienced an intense SMSD (scored between 7 and 10/10). Variation of the maximum intensity of SMSD between “before osteopathy studies” and “the last 12 months” was 1.2/10. This variation was influenced by the number of days students were manipulated during a week (p < 0.0001). On average, students underwent manipulation three days a week.ConclusionThis study confirms the important prevalence of SMSD among osteopathy students. This result led us to carry out a qualitative study for exploring students’ conceptions in health and spinal manipulative practices. 相似文献
98.
Chie Teramoto PHN RN MS Satoko Nagata PhD PHN RN Reiko Okamoto PhD PHN RN Ruriko Suzuki PHN RN MS Emiko Kishi PhD PHN RN Michie Nomura DSN PHN RN Noriko Jojima PHN RN MS Masumi Nishida PhD PHN RN Keiko Koide PhD PHN RN Emiko Kusano PhD PHN RN Saori Iwamoto PhD PHN RN Sachiyo Murashima PhD PHN RN 《Public health nursing (Boston, Mass.)》2015,32(6):654-661
99.
Ignasi Esteban Carmen Pastor-Quiones Lorena Usero Montserrat Plana Felipe García Lorna Leal 《Viruses》2021,13(3)
Over 36 million people worldwide are infected with HIV. Antiretroviral therapy (ART) has proven to be highly effective to prevent HIV-1 transmission, clinical progression and death. Despite this success, the number of HIV-1 infected individuals continues increasing and ART should be taken for life. Therefore, there are two main priorities: the development of preventive vaccines to protect from HIV acquisition and achieve an efficient control of HIV infection in the absence of ART (functional cure). In this sense, in the last few years, there has been a broad interest in new and innovative approaches such as mRNA-based vaccines. RNA-based immunogens represent a promising alternative to conventional vaccines because of their high potency, capacity for rapid development and potential for low-cost manufacture and safe administration. Some mRNA-based vaccines platforms against infectious diseases have demonstrated encouraging results in animal models and humans. However, their application is still limited because the instability and inefficient in vivo delivery of mRNA. Immunogens, design, immunogenicity, chemical modifications on the molecule or the vaccine delivery methods are all crucial interventions for improvement. In this review we, will present the current knowledge and challenges in this research field. mRNA vaccines hold great promises as part of a combined strategy, for achieving HIV functional cure. 相似文献
100.
Francisca Morgado Mariana Batista Ana Moreno Inês Coutinho 《Pediatric dermatology》2021,38(1):191-193
We present a 6‐year‐old girl with skin hyperpigmentation, leukoplakia, and onychodystrophy, the classic mucocutaneous triad usually associated with dyskeratosis congenita. The patient also had premature graying of the hair, bone marrow failure, hepatitis, exudative retinopathy, osteopenia with multiple long bone fractures, and intracranial calcifications and brain cysts. Coats plus syndrome is a rare disease with a clinical and genetic overlap with dyskeratosis congenita. This disease is reviewed, with a focus on the pathogenesis of the genetic anomalies and its background as a telomere biology disorder. 相似文献