全文获取类型
收费全文 | 914篇 |
免费 | 40篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 36篇 |
妇产科学 | 10篇 |
基础医学 | 97篇 |
口腔科学 | 15篇 |
临床医学 | 83篇 |
内科学 | 297篇 |
皮肤病学 | 11篇 |
神经病学 | 12篇 |
特种医学 | 248篇 |
外科学 | 34篇 |
综合类 | 16篇 |
预防医学 | 24篇 |
眼科学 | 5篇 |
药学 | 32篇 |
1篇 | |
中国医学 | 8篇 |
肿瘤学 | 26篇 |
出版年
2021年 | 3篇 |
2020年 | 4篇 |
2018年 | 5篇 |
2017年 | 3篇 |
2016年 | 6篇 |
2015年 | 12篇 |
2014年 | 10篇 |
2013年 | 20篇 |
2012年 | 18篇 |
2011年 | 43篇 |
2010年 | 30篇 |
2009年 | 33篇 |
2008年 | 33篇 |
2007年 | 35篇 |
2006年 | 33篇 |
2005年 | 31篇 |
2004年 | 15篇 |
2003年 | 13篇 |
2002年 | 12篇 |
2001年 | 8篇 |
2000年 | 12篇 |
1999年 | 10篇 |
1998年 | 38篇 |
1997年 | 36篇 |
1996年 | 37篇 |
1995年 | 46篇 |
1994年 | 37篇 |
1993年 | 37篇 |
1992年 | 8篇 |
1991年 | 4篇 |
1990年 | 11篇 |
1989年 | 37篇 |
1988年 | 23篇 |
1987年 | 29篇 |
1986年 | 37篇 |
1985年 | 21篇 |
1984年 | 17篇 |
1983年 | 14篇 |
1982年 | 15篇 |
1981年 | 19篇 |
1980年 | 18篇 |
1979年 | 9篇 |
1978年 | 15篇 |
1977年 | 15篇 |
1976年 | 13篇 |
1975年 | 12篇 |
1959年 | 2篇 |
1958年 | 4篇 |
1957年 | 6篇 |
1954年 | 2篇 |
排序方式: 共有957条查询结果,搜索用时 15 毫秒
31.
CF Lanata RE Black H Creed-Kanashiro F Lazo ML Gallardo H Verastegui KH Brown 《Acta paediatrica (Oslo, Norway : 1992)》1992,81(S383):98-103
Dietary intake during diarrhea in children less than three years of age was estimated from information recorded on illustrated dietary forms used by children's caretakers during the first week of illness in a prospective community-based study of diarrheal diseases in Lima, Peru. The frequency of consumption and the amount consumed of food groups and selected commonly consumed foods were analyzed by the final duration of the diarrheal episode. Cereals were less frequently consumed during the acute phase of diarrheal episodes that ultimately became persistent (>14 days'duration), apparently shortening the duration of the episode by one day (median duration of four days in children not consuming vs three days in children consuming cereals during diarrhea, p <0.02 Kaplan-Meier logrank test). Only roots and tubers (mainly potatoes) were consumed in greater quantity during episodes that became persistent. There was no evidence that consumption of breast milk or non-maternal milk was associated with an alteration in diarrheal duration. This study provides further evidence of the beneficial effects of continuing feeding during diarrhea using foods available at the home level, especially cereals, which are commonly used in the diet of young children. 相似文献
32.
33.
Extracts of Monascusus Purpureus beyond Statins——Profile of Efficacy and Safety of the Use of Extracts of Monascus Purpureus 下载免费PDF全文
BIANCHI Antonio 《中国结合医学杂志》2005,(4)
Monascus purpureus is a fungus that has been tradi-tionally used in China for thousands of years to produce ricewine . Traditionally the fungus is used to ferment non-gluti-nous cooking of rice ,to produce a kind of famous red ricewine .Its main traditional indications consist of disordersdue to the accumulation of fats (nosologically linked withthe problems of stasis of circulation in traditional Chinesemedicine) ,liver disorders and some forms of tumor as ithelps i mprove the circulation of … 相似文献
34.
35.
NC de Bruin KA van Velthoven M de Ridder T Stijnen RE Juttmann HJ Degenhart HK Visser 《Archives of disease in childhood》1996,74(5):386-399
Data on body composition in conjunction with reference centiles are helpful in identifying the severity of growth and nutritional disorders in infancy and for evaluating the adequacy of treatment given during this important period of rapid growth. Total body fat (TBF) and fat-free mass (FFM) were estimated from total body electrical conductivity (TBEC) measurements in 423 healthy term Caucasian infants, aged 14-379 days. Cross sectional age, weight, and length related centile standards are presented for TBF and FFM. Centiles were calculated using Altman's method, based on polynomial regression and modelling of the residual variation. The TBF percentage steeply increased during the first half year of life, and slowly declined beyond this age. Various simple TBEC derived anthropometric prediction equations for TBF and FFM are available to be used in conjunction with these standards. Regression equations for the P50 and the residual SD, depending on age, weight, or length, are provided for constructing centile charts and calculating standard deviation scores. 相似文献
36.
Leaf AN Wolf BC Kirkwood JM Haselow RE 《Medical oncology (Northwood, London, England)》2000,17(1):47-51
This study of etoposide in thyroid cancer was designed to determine the activity and toxicity of etoposide in a variety of
inoperable, thyroid hormone insensitive, and radio-iodine resistant primary cancers of the thyroid. The patients were required
to have an ECOG performance status of at least 3 and no previous exposure to chemotherapy. The etoposide was given at a dose
of 140 mg/m2 daily for 3 days and every 3 weeks until progression. The study was closed after 18 months because of poor accrual. There
were no responses seen among the 10 patients accrued. The toxicity was primarily hematologic. There was no evidence of activity
of etoposide in thyroid carcinoma, although this study lacked significant power because of the poor accrual. 相似文献
37.
38.
39.
INGEGERD MEJÀRE HANS-GÖRAN GRÖNDAHL KERSTIN CARLSTEDT ANN-CHRISTIN GREVER EVA OTTOSSON 《European journal of oral sciences》1985,93(2):178-184
In 63 teenagers the proximal surfaces of premolars to be extracted for orthodontic reasons and the adjacent surfaces of neighboring teeth, 598 surfaces in all, were examined radiographically and by probing. Direct inspection after extraction revealed that 51% of the surfaces had incipient carious lesions and 5% lesions with cavities. Of the surfaces with cavities 82.1% were correctly diagnosed radiographically if any radiolucency, regardless of its extent, was used as a diagnostic criterion. However, this yielded a false positive rate of 19.6%. If only radioluccncies extending at least into the inner third of the enamel were called positive the true positive rate was 36.7% and the associated false positive rate 1.6%. At a 5% cavity frequency the predictive positive values were 17% and 53%, respectively. Probing yielded a true positive rate of about 29% and a false positive rate of 1.1% with a predictive positive value of 50-57%. All radiolucencies extending into the dentin were associated with cavities. When the most liberal radiographic criterion was used 37.5% of all carious lesions, whether associated with a cavity or not, were detected and 3.8% of sound surfaces were falsely called carious. The corresponding predictive positive value at the actual rate of incipient lesions and lesions with cavities was 92.6%. 相似文献
40.