全文获取类型
收费全文 | 2479篇 |
免费 | 154篇 |
国内免费 | 17篇 |
专业分类
耳鼻咽喉 | 59篇 |
儿科学 | 90篇 |
妇产科学 | 30篇 |
基础医学 | 347篇 |
口腔科学 | 195篇 |
临床医学 | 156篇 |
内科学 | 436篇 |
皮肤病学 | 42篇 |
神经病学 | 144篇 |
特种医学 | 116篇 |
外科学 | 331篇 |
综合类 | 90篇 |
一般理论 | 2篇 |
预防医学 | 283篇 |
眼科学 | 35篇 |
药学 | 159篇 |
中国医学 | 21篇 |
肿瘤学 | 114篇 |
出版年
2023年 | 22篇 |
2022年 | 58篇 |
2021年 | 87篇 |
2020年 | 60篇 |
2019年 | 65篇 |
2018年 | 101篇 |
2017年 | 79篇 |
2016年 | 77篇 |
2015年 | 94篇 |
2014年 | 136篇 |
2013年 | 146篇 |
2012年 | 208篇 |
2011年 | 200篇 |
2010年 | 131篇 |
2009年 | 96篇 |
2008年 | 122篇 |
2007年 | 128篇 |
2006年 | 123篇 |
2005年 | 86篇 |
2004年 | 86篇 |
2003年 | 69篇 |
2002年 | 45篇 |
2001年 | 31篇 |
2000年 | 25篇 |
1999年 | 38篇 |
1998年 | 44篇 |
1997年 | 23篇 |
1996年 | 27篇 |
1995年 | 15篇 |
1994年 | 22篇 |
1993年 | 14篇 |
1992年 | 14篇 |
1991年 | 15篇 |
1990年 | 14篇 |
1989年 | 12篇 |
1988年 | 13篇 |
1987年 | 11篇 |
1986年 | 5篇 |
1985年 | 9篇 |
1984年 | 8篇 |
1983年 | 8篇 |
1982年 | 12篇 |
1981年 | 8篇 |
1980年 | 11篇 |
1979年 | 7篇 |
1978年 | 7篇 |
1977年 | 6篇 |
1976年 | 9篇 |
1975年 | 5篇 |
1969年 | 5篇 |
排序方式: 共有2650条查询结果,搜索用时 0 毫秒
31.
NG da Silva AS Carreira EN Pedreira FM Tuji KL Ortega JD Pinheiro 《Head & face medicine》2012,8(1):23
ABSTRACT: Central giant cell lesions are benign intraosseous proliferative lesions that have considerable local aggressiveness. Nonsurgical treatment methods, such as intralesional corticosteroid injections, systemic calcitonin and interferon have been reported. Recently, bisphosphonates have been used to treat central giant cell lesions. A case of a 36-year-old male with a central giant cell lesion crossing the mandibular midline was treated with intralesional corticosteroids combined with alendronate sodium for the control of systemic bone resorption. The steroid injections and the use of bisphosphonates were stopped after seven months when further needle penetration into the lesion was not possible due to new bone formation. After two years, the bony architecture was near normal, and only minimal radiolucency was present around the root apices of the involved teeth. The patient was followed up for four years, and panoramic radiography showed areas of new bone formation. Thus far, neither recurrence nor side effects of the medication have been detected. 相似文献
32.
33.
34.
35.
Narjara Campos de Araújo Orivaldo Florêncio de Souza Mauro Jos de Deus Morais Francisco Naildo Cardoso Leito Italla Maria Pinheiro Bezerra Luiz Carlos de Abreu Luciano Miller Reis Rodrigues 《Medicine》2021,100(16)
Musculoskeletal disorders gradually affect workers in different parts of the world, compromising their occupational health and quality of life. Professionals exposed to these symptoms include the motorcycle taxi driver, whose pain is due to the overuse of the musculoskeletal system and little time to recover it.To identify the prevalence of musculoskeletal symptoms in motorcycle taxi drivers in the city of Rio Branco, Acre, Brazil, West Amazon.Cross-sectional study, involving 296 motorcycle taxi drivers in the city of Rio Branco-Acre, Brazil, male, from December 2016 to February 2017. The Nordic Musculoskeletal Questionnaire was used to collect information related to symptoms (pain, discomfort, or numbness) in the last 7 days of work. For the exclusion criteria were, being female; not reside outside the city of Rio Branco, Acre; having less than 3 months of work activity; not be carrying out their work activities at the time of application of the protocol; be limited by clinical or physical issues at the time of application of the protocol. The data obtained in the questionnaire were entered into the Epidata program (Epidata Association, Odense, Denmark) and then transferred to the STATA 10 statistical program (Stata Corp., College Station), for categorization and statistical analysis.The study population is over 36 years old; most reported having a partner and a higher education level. The average daily working hours of the participants were 12 hours, with the majority working over 12 hours daily. Most of the epidemiological variables factors were associated with musculoskeletal pain when the prevalence and prevalence ratio analyzes were performed. Higher prevalence of musculoskeletal symptoms in the lumbar region is with 17.9%. In the lower limbs, the most affected joint was the ankle (5.7%), followed by the hip (5.07%) and knee (5.07%), respectively. Insomnia was present in 55.35% and self-reported headache in 49.4% of participants.The musculoskeletal disorders generated by the daily service of motorcycle taxi drivers are directly affecting the quality of life of these professionals. 相似文献
36.
37.
38.
Francisco Rogerlandio Martins-Melo Marta Cristhiany Cunha Pinheiro Alberto Novaes Ramos Jr Carlos Henrique Alencar Fernando Schemelzer de Moraes Bezerra Jorg Heukelbach 《Emerging infectious diseases》2015,21(10):1820-1823
We analyzed spatiotemporal patterns of 8,756 schistosomiasis-related deaths in Brazil during 2000–2011 and identified high-risk clusters of deaths, mainly in highly schistosomiasis-endemic areas along the coast of Brazil’s Northeast Region. Schistosomiasis remains a neglected public health problem with a high number of deaths in disease-endemic and emerging focal areas. 相似文献
39.
A I Ko J N Reis S J Coppola E L Gouveia S M Cordeiro T S L?bo R M Pinheiro K Salgado C M Ribeiro Dourado J Tavares-Neto H Rocha M Galv?o Reis W D Johnson L W Riley 《Clinical infectious diseases》2000,30(1):78-86
Active hospital-based surveillance in the city of Salvador, Brazil, from December 1995 through October 1998, identified 221 patients with confirmed pneumococcal meningitis. Of these 221 patients, 29 (13%) had isolates with intermediate-level resistance to penicillin. Infection with these penicillin-nonsusceptible isolates was significantly associated with age of <2 years (P<.0019), previous antibiotic use (P<.0006), and coresistance to trimethoprim-sulfamethoxazole (P<.0000). Serotype 14 was the most prevalent serotype (55.2%) of penicillin-nonsusceptible isolates. Strain typing by repetitive element BOX polymerase chain reaction (PCR) analysis showed that penicillin-nonsusceptible serotype 14 isolates had closely related BOX PCR patterns, whereas penicillin-susceptible serotype 14 isolates each had distinct, unrelated patterns. Penicillin-nonsusceptible serotype 14 isolates from Salvador and other Brazilian cities had similar BOX PCR patterns. These observations indicate that in Brazil a large proportion of cases of penicillin-nonsusceptible pneumococcal meningitis appear to be caused by a closely related group of serotype 14 strains that may have disseminated to widely separate geographic areas. 相似文献
40.
Pinheiro Liz Helena Moraes Guimarães Ludmila Silva Antunes Leonardo Santos Küchler Erika Calvano Kirschneck Christian Antunes Lívia Azeredo Alves 《Clinical oral investigations》2021,25(10):5613-5627
Clinical Oral Investigations - To perform a systematic review/meta-analysis to elucidate the scientific basis for the association between genetic variations and risk of external apical root... 相似文献