全文获取类型
收费全文 | 1696163篇 |
免费 | 124406篇 |
国内免费 | 2488篇 |
专业分类
耳鼻咽喉 | 24307篇 |
儿科学 | 58116篇 |
妇产科学 | 46233篇 |
基础医学 | 250564篇 |
口腔科学 | 46212篇 |
临床医学 | 147857篇 |
内科学 | 331856篇 |
皮肤病学 | 37949篇 |
神经病学 | 130107篇 |
特种医学 | 66096篇 |
外国民族医学 | 715篇 |
外科学 | 258670篇 |
综合类 | 34275篇 |
现状与发展 | 1篇 |
一般理论 | 480篇 |
预防医学 | 128219篇 |
眼科学 | 38199篇 |
药学 | 127573篇 |
2篇 | |
中国医学 | 3241篇 |
肿瘤学 | 92385篇 |
出版年
2018年 | 16938篇 |
2016年 | 14097篇 |
2015年 | 15918篇 |
2014年 | 22077篇 |
2013年 | 33898篇 |
2012年 | 46290篇 |
2011年 | 49480篇 |
2010年 | 29418篇 |
2009年 | 27981篇 |
2008年 | 47567篇 |
2007年 | 50914篇 |
2006年 | 51456篇 |
2005年 | 49967篇 |
2004年 | 48891篇 |
2003年 | 47070篇 |
2002年 | 46423篇 |
2001年 | 82297篇 |
2000年 | 85584篇 |
1999年 | 72137篇 |
1998年 | 19477篇 |
1997年 | 17472篇 |
1996年 | 18144篇 |
1995年 | 17029篇 |
1994年 | 16116篇 |
1993年 | 15002篇 |
1992年 | 56788篇 |
1991年 | 56259篇 |
1990年 | 55143篇 |
1989年 | 52801篇 |
1988年 | 48714篇 |
1987年 | 48007篇 |
1986年 | 44795篇 |
1985年 | 42938篇 |
1984年 | 32024篇 |
1983年 | 27008篇 |
1982年 | 15465篇 |
1981年 | 14160篇 |
1980年 | 12831篇 |
1979年 | 29221篇 |
1978年 | 20563篇 |
1977年 | 17388篇 |
1976年 | 16404篇 |
1975年 | 18030篇 |
1974年 | 21229篇 |
1973年 | 20270篇 |
1972年 | 18968篇 |
1971年 | 17570篇 |
1970年 | 16477篇 |
1969年 | 15257篇 |
1968年 | 14054篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
The paper reviews existing reports on relations between pathologies leading to malabsorption and dental lesion in children. The following dental alterations are reported in the literature: delayed eruption of deciduous teeth, hypoplasia of enamel and dental caries. These lesions have been observed in gastrointestinal pathologies, for example, coeliac disease, chronic diarrhea and recurrent vomiting, intolerance of cow's milk protein, Crohn's disease and salmonellosis. The delayed eruption of deciduous teeth and hypoplasia of the enamel are certainly correlated to malabsorption and maldigestion, especially if these are protracted over time. Dental caries may be due to poor oral hygiene, poor diet and to the presence of modified calcification. Only a comparative study with a control group will enable the effective prevalence to be assessed. 相似文献
993.
We describe a case of Munchausen's syndrome by proxy in a 12 years old child. The administration of glibenclamide by the mother led to severe hypoglycemias in the child, who underwent various instrumental researches and a subtotal pancreatectomy before the final diagnosis could be reached. The diagnosis also was possible with the substantial help of an accurate psychological survey. The case solution, with disappearance of hypoglycemias, was made possible by the removal of the maternal presence settled by the juvenile court. 相似文献
994.
995.
P. T. Wakode P. L. Joshi M. N. Mahore 《Indian journal of otolaryngology and head and neck surgery》1989,41(4):138-140
Nasal Cytogram is a simple, economical and reliable investigation. Although its utility was recognised as early s1927, it has not gained much popularity. Here an attempt is madeto assess the efficacy of nasal cytology in the light of histology, to diagnose various nasal conditions.127 cases of common rhinological problem were studied at Govt. Medical College, Nagpur. This investigation was found to be simple,
reliable & economical. 相似文献
996.
This article is designed to help dentists make better decisions regarding capitation programs. It focuses on approaches to costs that can be useful. An example is given that illustrates how these cost concepts might be used to analyze a capitation proposal. 相似文献
997.
998.
999.
G.
berg B. Simonsson B. Smedmyr T. H. Ttterman P. Venge 《European journal of haematology》1987,38(4):356-362
Bone-marrow regeneration after chemo- and radiotherapy-induced aplasia can be monitored by serum levels of myeloperoxidase (MPO), lysozyme (LYS) and lactoferrin (LF). In 10 patients with leukemia, serum measurements were performed before and after bone-marrow transplantation. Bone-marrow regeneration was suggested by increments in serum MPO and LYS 5 and 4 days prior to the increase in mononuclear cells (Mono) and 10 and 9 d before the increase in polymorphonuclear leukocytes (PMN) in the peripheral blood. LF started to rise 4.5 d before detectable circulating PMNs. 2 patients with early relapses of leukemia post transplantation are shown to display atypical patterns of serum MPO and LYS. We conclude that serum measurements of MPO, LYS and LF may be used as early and sensitive means to monitor bone-marrow activity during hematological regeneration. However, the findings also strongly support the earlier proposal that MPO alone may be used to reflect myeloid activity in the bone-marrow in general. 相似文献
1000.
Acquired supravalvar membranous stenosis of the left atrioventricular valve developed in a nine year old boy with atrioventricular discordance. The supravalvar membrane had not been present when a partial annuloplasty was performed on the left atrioventricular valve eight years before. The stenosis was relieved by operative excision of the membrane. 相似文献