全文获取类型
收费全文 | 530307篇 |
免费 | 27656篇 |
国内免费 | 496篇 |
专业分类
耳鼻咽喉 | 6685篇 |
儿科学 | 16936篇 |
妇产科学 | 12538篇 |
基础医学 | 92655篇 |
口腔科学 | 12354篇 |
临床医学 | 48509篇 |
内科学 | 95503篇 |
皮肤病学 | 11869篇 |
神经病学 | 34034篇 |
特种医学 | 19772篇 |
外国民族医学 | 53篇 |
外科学 | 78085篇 |
综合类 | 7613篇 |
现状与发展 | 2篇 |
一般理论 | 107篇 |
预防医学 | 38561篇 |
眼科学 | 11945篇 |
药学 | 41420篇 |
1篇 | |
中国医学 | 1126篇 |
肿瘤学 | 28691篇 |
出版年
2021年 | 3902篇 |
2018年 | 5738篇 |
2017年 | 4128篇 |
2016年 | 4871篇 |
2015年 | 5365篇 |
2014年 | 7119篇 |
2013年 | 10516篇 |
2012年 | 15597篇 |
2011年 | 17412篇 |
2010年 | 9968篇 |
2009年 | 8822篇 |
2008年 | 15728篇 |
2007年 | 17460篇 |
2006年 | 16957篇 |
2005年 | 16285篇 |
2004年 | 15901篇 |
2003年 | 15279篇 |
2002年 | 14798篇 |
2001年 | 22432篇 |
2000年 | 22974篇 |
1999年 | 18926篇 |
1998年 | 5234篇 |
1997年 | 4370篇 |
1996年 | 4398篇 |
1995年 | 4127篇 |
1992年 | 14414篇 |
1991年 | 15820篇 |
1990年 | 15952篇 |
1989年 | 15632篇 |
1988年 | 14312篇 |
1987年 | 14202篇 |
1986年 | 13171篇 |
1985年 | 12688篇 |
1984年 | 9395篇 |
1983年 | 8002篇 |
1982年 | 4181篇 |
1979年 | 8939篇 |
1978年 | 6384篇 |
1977年 | 5150篇 |
1976年 | 5504篇 |
1975年 | 6613篇 |
1974年 | 7419篇 |
1973年 | 7159篇 |
1972年 | 6597篇 |
1971年 | 6309篇 |
1970年 | 5887篇 |
1969年 | 5467篇 |
1968年 | 5162篇 |
1967年 | 4621篇 |
1966年 | 3963篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
M K Chowdhury V M Gupta R Bairagi B N Bhattacharya 《European journal of clinical nutrition》1990,44(7):515-525
It is posited that diarrhoeal illness during one period has influence on diarrhoeal illness in a subsequent period. This relationship may potentially mask the association between malnutrition and subsequent diarrhoea. To test this, we analysed data on cross-sectional anthropometry in combination with data on diarrhoeal morbidity collected longitudinally in a community-based study of 1262 children (aged 6-60 months) during March-December, 1976, in Matlab, Bangladesh. The results confirmed the posited relationship between diarrhoeal morbidities in two consecutive periods and showed that the risks of diarrhoeal attack and longer diarrhoeal illness increased more than threefold during the 2 months following diarrhoeal illness during the preceding 2 months (previous diarrhoea). Children with no previous diarrhoea indicated a positive association between malnutrition and subsequent diarrhoea, but the pattern found among children with previous diarrhoea was not understandable. Logistic regression analyses performed separately for younger and older children showed that controlling for effects of previous diarrhoea, maternal illiteracy and household poverty, severe malnutrition as assessed by weight-for-age was found to be strongly associated with the risk of longer diarrhoeal illness in a 2-month interval in the age group 24-60 months; in the same age group the association with the risk of diarrhoeal attack was significant at the 10 per cent level. No such association for malnutrition, however, was found in the age group 6-23 months. 相似文献
992.
993.
We report the first case of membranous lupus nephritis occurring in a child with congenital AIDS. Hypocomplementemia, elevated titers of anti-nuclear antibody and antibody to double-stranded DNA supported the diagnosis of associated systemic lupus erythematosus (SLE). The pathogenetic implications of this coexistence of AIDS and SLE are discussed. 相似文献
994.
Plasmapheresis was used to correct blood lipid composition in patients with angina at rest and angina of effort (functional classes 3-4). In addition to a drop in total cholesterol and triglycerides, cholesterol in low and very-low-density lipoproteins fell abruptly, while high-density-lipoprotein cholesterol, on the contrary, increased considerably. Clinical improvement of the patients was also recorded. 相似文献
995.
996.
997.
998.
999.
1000.
E V Craig 《Orthopedics》1988,11(1):125-136
It appears that total shoulder replacement can be performed with a high degree of patient satisfaction, with few complications, and with long-term results which certainly appear to rival the success of other arthroplasties. However, the technique is extremely demanding and requires an experienced shoulder surgeon, who must successfully resolve numerous intraoperative variables and problems, must be able to deal with factors which may affect the stability and strength of the implant, and must individualize the postoperative rehabilitation according to quality of bone and soft tissue, as well as the specific needs and desires of the patient. However, when performed technically satisfactorily with proper patient selection, with meticulous attention to the details of the soft tissue surrounding the implant, and with attention to the postoperative rehabilitation, the results have been impressive. Total shoulder replacement has successfully taken its place in the armamentarium of other total joint replacements which have dramatically altered the quality of life in the arthritic patient. 相似文献