全文获取类型
收费全文 | 175621篇 |
免费 | 38711篇 |
国内免费 | 5788篇 |
专业分类
耳鼻咽喉 | 3177篇 |
儿科学 | 3990篇 |
妇产科学 | 2937篇 |
基础医学 | 7143篇 |
口腔科学 | 6727篇 |
临床医学 | 35580篇 |
内科学 | 31537篇 |
皮肤病学 | 4374篇 |
神经病学 | 13922篇 |
特种医学 | 7100篇 |
外科学 | 24638篇 |
综合类 | 21636篇 |
现状与发展 | 51篇 |
一般理论 | 4篇 |
预防医学 | 23098篇 |
眼科学 | 3171篇 |
药学 | 9856篇 |
116篇 | |
中国医学 | 8396篇 |
肿瘤学 | 12667篇 |
出版年
2024年 | 919篇 |
2023年 | 6138篇 |
2022年 | 3750篇 |
2021年 | 6029篇 |
2020年 | 8176篇 |
2019年 | 3584篇 |
2018年 | 8593篇 |
2017年 | 9614篇 |
2016年 | 9645篇 |
2015年 | 11273篇 |
2014年 | 14572篇 |
2013年 | 17380篇 |
2012年 | 10927篇 |
2011年 | 11043篇 |
2010年 | 13690篇 |
2009年 | 15271篇 |
2008年 | 9480篇 |
2007年 | 8188篇 |
2006年 | 8630篇 |
2005年 | 6074篇 |
2004年 | 4279篇 |
2003年 | 3447篇 |
2002年 | 2890篇 |
2001年 | 3508篇 |
2000年 | 2276篇 |
1999年 | 2185篇 |
1998年 | 2379篇 |
1997年 | 2225篇 |
1996年 | 2273篇 |
1995年 | 1959篇 |
1994年 | 1295篇 |
1993年 | 1109篇 |
1992年 | 858篇 |
1991年 | 728篇 |
1990年 | 597篇 |
1989年 | 633篇 |
1988年 | 596篇 |
1987年 | 461篇 |
1986年 | 456篇 |
1985年 | 378篇 |
1984年 | 314篇 |
1983年 | 374篇 |
1982年 | 289篇 |
1981年 | 262篇 |
1980年 | 174篇 |
1979年 | 87篇 |
1978年 | 149篇 |
1977年 | 155篇 |
1976年 | 118篇 |
1972年 | 90篇 |
排序方式: 共有10000条查询结果,搜索用时 234 毫秒
41.
Jamaal L. Benjamin MD PhD Rebecca Dennis DO Stacy White Jr MD David Munson MD Sudha A. Anupindi MD Maciej Piskunowicz MD Kassa Darge MD PhD Ami Gokli MD Misun Hwang MD 《Journal of ultrasound in medicine》2020,39(5):1031-1036
Bowel diseases of prematurity, including necrotizing enterocolitis, are dreaded ailments of neonates. Early diagnosis is difficult, with clinical and radiographic findings often inconclusive. We present a novel use of contrast-enhanced ultrasound in detection of pediatric bowel disease. Early identification of compromised blood flow or an at-risk bowel can be quantitatively detected and monitored. This ability has implications for guidance of emerging therapies, allowing targeting of inflammation. These findings represent an advancement in detection of bowel disease in neonates. 相似文献
42.
43.
肺癌是世界上发病率最高的恶性肿瘤之一,外科手术为首选治疗方式。近年来许多新兴微创技术治疗肺癌取得了良好效果。氩氦冷冻消融术因具有损伤小、恢复快、安全性高、并发症少等优点,已取得医患双方认可。冷冻消融适用于不能手术切除的早期肺癌及减少晚期肺癌负荷。肿瘤是一种全身性疾病,因此冷冻消融联合其他治疗方法将是未来肺癌治疗发展方向,从而改善患者临床症状,提高生活质量,延长生存时间,达到最佳治疗效果。该文就冷冻消融治疗及与其他方法综合治疗肺癌研究现状和进展作一综述。 相似文献
44.
45.
目的 分析微滴式数字PCR(droplet digital PCR, ddPCR)和实时荧光定量PCR(quantitative real-time PCR,qPCR)的核酸检测结果,比较两种方法检测各类样本的差异性,为改进新型冠状病毒核酸检测方案提供数据支持。 方法 利用ddPCR和qPCR技术对已经确诊的3例新型冠状病毒肺炎患者发病不同时间的全血、尿液、粪便共22份标本进行新型冠状病毒核酸检测。 结果 两种方法对人保守区域基因扩增结果一致:全血标本信号最强,尿液次之,粪便最少;ddPCR在1份全血,1份尿液,5份粪便中检出ORF-1ab和N基因的阳性微滴,qPCR仅在3份粪便中检出上述基因,漏检的3个标本基因拷贝数平均浓度为128 copies/ml;ddPCR在发病<5、5~15、>15 d的各类标本中都有检出,qPCR检出以中晚期为主;重症病例用ddPCR均可测到阳性微滴,qPCR检测的各类标本均为阴性;轻症病例的各类标本中qPCR只有粪便核酸检测阳性,ddPCR检出率高于qPCR。 结论 ddPCR可以有效克服qPCR 灵敏度不足的难题,是对qPCR 的有益补充,尤其是针对病毒载量比较低的血液、尿液和可疑的粪便或肛拭子标本,适用于早期感染的判断及患者治愈后出院诊断。 相似文献
46.
Maaike van Gerwen MD Naomi Alpert MS Raja Flores MD Emanuela Taioli MD PhD 《American journal of industrial medicine》2020,63(2):115-120
The association between asbestos exposure, mainly in occupational settings, and malignant mesothelioma has been well established; this has prompted several countries to establish mesothelioma epidemiologic surveillance programs often at the request of national agencies. This review compares currently existing mesothelioma registries worldwide to develop a concept model for a US real-time case capture mesothelioma registry. Five countries were identified with a mesothelioma specific registry, including Italy, France, UK, Australia, and South Korea. All, except the UK, used interviews to collect exposure data. Linkage with the national death index was available or was in future plans for all registries. The registries have limited information on treatment, quality of life, and other patient-centered outcomes such as symptoms and pain management. To thoroughly collect exposure data, “real-time” enrollment is preferable; to maximize the capture of mesothelioma cases, optimal coverage, and a simplified consent process are needed. 相似文献
47.
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
48.
49.
Clare Delany PhD Master MSPT BAppSc Ian Edwards PhD Grad Dip PT BAppSc Caroline Fryer PhD Grad Dip BAppSc 《Physiotherapy theory and practice》2019,35(7):663-676
The profile and reach of physiotherapy has expanded in areas of extended scope of practice, and broader engagement with population needs beyond the individual treatment encounter. These changes raise increasingly complex ethical challenges evidenced by growth in physiotherapy-based ethics studies and discussions. This paper examines how a broad cross section of Australian physiotherapists perceive, interpret, and respond to ethical challenges in their work contexts and how professional codes of conduct are used in their practice. Using an interpretive qualitative methodology, purposive sampling of 88 members of national clinical special interest groups were recruited for focus group discussions. Narrative-based and thematic data analysis identified ethical challenges as emerging from specific clinical contexts, and influenced by health organizations, funding policies, workplace relationships, and individually held perspectives. Five themes were developed to represent these findings: (1) the working environment, (2) balancing diverse needs and expectation, (3) defining ethics, (4) striving to act ethically, and (5) talking about ethics. The results portray a diverse and complex ethical landscape where therapists encounter and grapple with ethical questions emerging from the impact of funding models and policies affecting clinical work, expanding boundaries and scope of practice and changing professional roles and relationships. Codes of conduct were described as foundational ethical knowledge but not always helpful for “in the moment” ethical decision-making. Based on this research, we suggest how codes of conduct, educators, and professional associations could cultivate and nurture ethics capability in physiotherapy practitioners for these contemporary challenges. 相似文献
50.