全文获取类型
收费全文 | 14336篇 |
免费 | 772篇 |
国内免费 | 94篇 |
专业分类
耳鼻咽喉 | 131篇 |
儿科学 | 327篇 |
妇产科学 | 243篇 |
基础医学 | 1956篇 |
口腔科学 | 554篇 |
临床医学 | 1257篇 |
内科学 | 3897篇 |
皮肤病学 | 254篇 |
神经病学 | 1285篇 |
特种医学 | 409篇 |
外科学 | 2015篇 |
综合类 | 44篇 |
一般理论 | 4篇 |
预防医学 | 747篇 |
眼科学 | 200篇 |
药学 | 774篇 |
中国医学 | 36篇 |
肿瘤学 | 1069篇 |
出版年
2023年 | 106篇 |
2022年 | 240篇 |
2021年 | 398篇 |
2020年 | 291篇 |
2019年 | 323篇 |
2018年 | 434篇 |
2017年 | 320篇 |
2016年 | 364篇 |
2015年 | 437篇 |
2014年 | 587篇 |
2013年 | 763篇 |
2012年 | 1171篇 |
2011年 | 1143篇 |
2010年 | 682篇 |
2009年 | 592篇 |
2008年 | 978篇 |
2007年 | 980篇 |
2006年 | 948篇 |
2005年 | 897篇 |
2004年 | 825篇 |
2003年 | 690篇 |
2002年 | 647篇 |
2001年 | 113篇 |
2000年 | 98篇 |
1999年 | 123篇 |
1998年 | 122篇 |
1997年 | 106篇 |
1996年 | 105篇 |
1995年 | 74篇 |
1994年 | 69篇 |
1993年 | 55篇 |
1992年 | 54篇 |
1991年 | 55篇 |
1990年 | 38篇 |
1989年 | 34篇 |
1988年 | 32篇 |
1987年 | 21篇 |
1986年 | 25篇 |
1985年 | 23篇 |
1984年 | 34篇 |
1983年 | 31篇 |
1982年 | 24篇 |
1981年 | 23篇 |
1980年 | 12篇 |
1979年 | 10篇 |
1978年 | 9篇 |
1977年 | 9篇 |
1976年 | 14篇 |
1975年 | 13篇 |
1974年 | 12篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Lara Silveira Abdo Aguiar Rita de Cssia Rossini Lismary Aparecida de Forville Mesquita Gerson Dellatorre 《Journal of Cosmetic Dermatology》2019,18(6):1733-1736
Depigmented lesions may occur as postinflammatory sequelae of subacute cutaneous lupus erythematosus (SCLE), leading to great psychosocial impact. A 53‐year‐old male patient presented with post‐SCLE depigmented facial lesions after five years of disease stability. We proposed surgical treatment with melanocyte‐keratinocyte transplantation procedure (MKTP), and after five months the patient achieved 90% repigmentation, without Koebner phenomenon (KP). In theory, KP is a possible complication of MKTP procedure since the preparation of the receptor area involves the use of dermabrasion. In an attempt to avoid it, we suggest to maintain the treatment of the underlying disease and wait for a minimum period of disease stability before the procedure. 相似文献
2.
A case of Rubinstein‐Taybi syndrome associated with growth hormone deficiency in childhood 下载免费PDF全文
3.
4.
5.
6.
7.
8.
Gabi Mueller Claudio Perret Christina M Spengler 《Journal of rehabilitation medicine》2006,38(6):381-386
OBJECTIVE: Respiratory muscle endurance of able-bodied persons, assessed by normocapnic hyperpnoea at 70% of their maximal voluntary ventilation, usually ranges from 10 to 20 minutes. The aim of this study was to determine the level of ventilation that patients with paraplegia and tetraplegia can sustain for 10-20 minutes to later be used as the guideline for respiratory muscle endurance training. DESIGN: Pilot study; cross-over setting. SUBJECTS: Two groups, 8 patients with paraplegia and 6 with tetraplegia. METHODS: Respiratory muscle endurance tests were performed at 3 different intensities of normocapnic hyperpnoea, i.e. 20%, 40% and 60% maximal voluntary ventilation. Subjects performed partial re-breathing from a bag to assure normocapnia. Respiratory endurance was separately analysed for patients with paraplegia and tetraplegia. RESULTS: Mean respiratory endurance times were 46.0, 18.9 and 4.2 minutes at 20%, 40% and 60% maximal voluntary ventilation in patients with tetraplegia and 51.8, 38.8 and 12.2 minutes in patients with paraplegia. The duration differed significantly at 60% maximal voluntary ventilation between the groups. CONCLUSION: Minute ventilation to perform respiratory muscle endurance training can be set at around 40% of maximal voluntary ventilation for patients with tetraplegia and around 60% of maximal voluntary ventilation for patients with paraplegia, as these levels can be sustained for 10-20 minutes. 相似文献
9.
Mariela Dutra Gontijo Moura Soraya de Mattos Camargo Grossmann Linaena Méricy da Silva Fonseca Maria Inês Barreiros Senna Ricardo Alves Mesquita 《Journal of oral pathology & medicine》2006,35(6):321-326
BACKGROUND: Oral hairy leukoplakia (OHL) may be an indicator of the progression of Human Immunodeficiency Virus (HIV)-induced immuno-depression, and the evaluation of risk factors leading to OHL is important in the management of these HIV-infected patients. However, there are few studies that analyze risk factors leading to OHL in the Brazilian population. The aim of this case-control study is to present data about prevalence rates and risk factors leading to OHL in a sample of HIV-infected adults in Brazil. METHODS: This case-control study included 111 HIV-infected patients treated at a clinic for sexually transmitted diseases and HIV. In the initial examinations with dentists, variables were collected from all patients. Diagnosis of OHL was performed in accordance with the International Classification System and cytological features. The Fisher and the chi-squared tests were used for statistical analysis. The proportional prevalence and odds ratio were estimated. RESULTS: Outcome presented a positive, statistically significant association among the presence of OHL and viral load of 3000 copies/mul or greater (P = 0.0001; odds ratio (OR) = 5.8), presence of oral candidiasis (P = 0.0000; OR = 11.1), previous use of fluconazole (P = 0.0000; OR = 24.6), and use of systemic acyclovir (P = 0.032; OR = 4.3). Antiretroviral medication presented a negative, statistically significant association with the presence of OHL (P = 0.002; OR = 8.4). CONCLUSIONS: Prevalence of OHL was 28.8%. Viral load, oral candidiasis, previous use of fluconazole, and systemic acyclovir were determined to be risk factors for OHL. Antiretroviral medication proved to be protective against the development of OHL. 相似文献
10.