全文获取类型
收费全文 | 31294篇 |
免费 | 1757篇 |
国内免费 | 208篇 |
专业分类
耳鼻咽喉 | 278篇 |
儿科学 | 739篇 |
妇产科学 | 858篇 |
基础医学 | 3723篇 |
口腔科学 | 970篇 |
临床医学 | 2495篇 |
内科学 | 7439篇 |
皮肤病学 | 678篇 |
神经病学 | 3379篇 |
特种医学 | 1292篇 |
外国民族医学 | 3篇 |
外科学 | 4528篇 |
综合类 | 154篇 |
一般理论 | 5篇 |
预防医学 | 1371篇 |
眼科学 | 547篇 |
药学 | 2077篇 |
中国医学 | 52篇 |
肿瘤学 | 2671篇 |
出版年
2023年 | 237篇 |
2022年 | 497篇 |
2021年 | 925篇 |
2020年 | 562篇 |
2019年 | 715篇 |
2018年 | 880篇 |
2017年 | 607篇 |
2016年 | 750篇 |
2015年 | 831篇 |
2014年 | 1144篇 |
2013年 | 1407篇 |
2012年 | 2229篇 |
2011年 | 2246篇 |
2010年 | 1269篇 |
2009年 | 1109篇 |
2008年 | 1878篇 |
2007年 | 1804篇 |
2006年 | 1773篇 |
2005年 | 1684篇 |
2004年 | 1586篇 |
2003年 | 1360篇 |
2002年 | 1224篇 |
2001年 | 654篇 |
2000年 | 662篇 |
1999年 | 574篇 |
1998年 | 282篇 |
1997年 | 228篇 |
1996年 | 239篇 |
1995年 | 208篇 |
1994年 | 189篇 |
1993年 | 151篇 |
1992年 | 404篇 |
1991年 | 338篇 |
1990年 | 287篇 |
1989年 | 248篇 |
1988年 | 211篇 |
1987年 | 207篇 |
1986年 | 210篇 |
1985年 | 190篇 |
1984年 | 153篇 |
1983年 | 112篇 |
1982年 | 76篇 |
1981年 | 71篇 |
1980年 | 53篇 |
1979年 | 92篇 |
1974年 | 52篇 |
1973年 | 55篇 |
1972年 | 72篇 |
1971年 | 56篇 |
1968年 | 49篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Carlo De-Carolis Geraldine-A. Boyd Luca Mancinelli Stefano Pagano Stefano Eramo 《Medicina oral, patología oral y cirugía bucal》2015,20(2):e205-e210
With easy chemical synthesis from its precursor, methamphetamine (MA) is now widespread in many countries. The abuse of methamphetamine is associated with several negative effects on health, because MA is a neurotoxin and a dangerous central nervous system stimulant. It changes levels of neurotransmitters in the brain, releasing dopamine and inhibiting nor epinephrine uptake which increases sympathetic nervous system activity and can lead to cardiac arrhythmia, hypertension and tachypnea. The consequences of MA abuse are clearly manifested in oral diseases (like “meth mouth”) which is characterised by extensive caries, teeth grinding with ensuing dental wear and trismus. The present review was designed to fill the gap in knowledge about methamphetamine abuse in the European Union (EU) and to illustrate the main clinical effects of prolonged use. After describing the pharmacology and systemic effects of methamphetamine and concentrating on its effects on the mouth, the present review compares the epidemiology and incidence of abuse in the world, particularly the USA and the EU.
Key words:Methamphetamine, “Meth mouth”, drug abuse, oral health. 相似文献
2.
3.
Del Lama Rafael Silva Candido Raquel Mariana Chiari-Correia Natália Santana Nogueira-Barbosa Marcello Henrique de Azevedo-Marques Paulo Mazzoncini Tinós Renato 《Journal of digital imaging》2022,35(3):446-458
Journal of Digital Imaging - Vertebral Compression Fracture (VCF) occurs when the vertebral body partially collapses under the action of compressive forces. Non-traumatic VCFs can be secondary to... 相似文献
4.
5.
6.
7.
Oliver Sartor MD Daniel Heinrich MD Neil Mariados MD Maria José Méndez Vidal MD Daniel Keizman MD Camilla Thellenberg Karlsson MD Avivit Peer MD Giuseppe Procopio MD Stephen J. Frank MD Kalevi Pulkkanen MD Eli Rosenbaum MD Stefano Severi MD José Trigo MD Lucia Trandafir MD Volker Wagner MD Rui Li MS Luke T. Nordquist MD 《The Prostate》2019,79(14):1683-1691
8.
9.
Rosario Fernández-Plata Rogelio Pérez-Padilla Rodrigo Del Río-Hidalgo Cecilia García-Sancho Laura Gochicoa-Rangel Christian Rodríguez-Hernández Luis Torre-Bouscoulet David Martínez-Briseño 《Archivos de bronconeumología》2019,55(10):513-518
IntroductionPeople with Down syndrome (DS) have high respiratory morbidity, evaluating their respiratory health with standardized, objective tests is desirable. Thus, the objective of this study was to evaluate the technical quality of Pulmonary Function Tests (PFTs) to determine which ones are most suitable for this population.MethodsParticipants included children, teenagers and adults with DS, 5 years of age or older (n = 302). The technical quality of the impulse oscillometry system (IOS), forced spirometry, lung-diffusing capacity for carbon monoxide (DLCO), and 6-min walk test (6MWT) were analyzed by age group. Capnography and pulse oximetry were included in the study. Technical quality was determined on the basis of current international PFTs standards.ResultsFifty-one percent of participants were males. A total of 184 participants (71%) who completed the IOS fulfilled the quality criteria, while 210 (70%) completed the 6MWT. Performance on forced spirometry and DLCO was poor. All pulse oximetries and 96% percent heart rates obtained had good quality, but exhaled carbon dioxide (PetCO2) and respiratory rate (RR) showed deficient repeatability.ConclusionsIOS appears to be the most reliable instrument for evaluating lung mechanics in individuals with DS. 相似文献
10.
María Cabrerizo Gloria Trallero María José Pena Amaia Cilla Gregoria Megias Carmen Mu?oz-Almagro Eva Del Amo Diana Roda Ana Isabel Mensalvas Antonio Moreno-Docón Juan García-Costa Nuria Rabella Manuel Ome?aca María Pilar Romero Sara Sanbonmatsu-Gámez Mercedes Pérez-Ruiz María José Santos-Mu?oz Cristina Calvo And the study group of “Enterovirus parechovirus infections in children under ?years-old Spain” PI- 《European journal of pediatrics》2015,174(11):1511-1516