全文获取类型
收费全文 | 874篇 |
免费 | 170篇 |
国内免费 | 17篇 |
专业分类
耳鼻咽喉 | 12篇 |
儿科学 | 47篇 |
妇产科学 | 9篇 |
基础医学 | 41篇 |
口腔科学 | 10篇 |
临床医学 | 156篇 |
内科学 | 238篇 |
皮肤病学 | 29篇 |
神经病学 | 44篇 |
特种医学 | 76篇 |
外科学 | 176篇 |
综合类 | 49篇 |
现状与发展 | 20篇 |
预防医学 | 56篇 |
眼科学 | 25篇 |
药学 | 24篇 |
中国医学 | 3篇 |
肿瘤学 | 46篇 |
出版年
2024年 | 6篇 |
2023年 | 42篇 |
2021年 | 18篇 |
2020年 | 23篇 |
2019年 | 9篇 |
2018年 | 49篇 |
2017年 | 44篇 |
2016年 | 31篇 |
2015年 | 40篇 |
2014年 | 39篇 |
2013年 | 55篇 |
2012年 | 17篇 |
2011年 | 26篇 |
2010年 | 46篇 |
2009年 | 61篇 |
2008年 | 29篇 |
2007年 | 22篇 |
2006年 | 28篇 |
2005年 | 15篇 |
2004年 | 12篇 |
2003年 | 14篇 |
2002年 | 15篇 |
2001年 | 20篇 |
2000年 | 12篇 |
1999年 | 19篇 |
1998年 | 28篇 |
1997年 | 32篇 |
1996年 | 43篇 |
1995年 | 30篇 |
1994年 | 18篇 |
1993年 | 22篇 |
1992年 | 9篇 |
1991年 | 8篇 |
1990年 | 11篇 |
1989年 | 14篇 |
1988年 | 19篇 |
1987年 | 15篇 |
1986年 | 11篇 |
1985年 | 14篇 |
1984年 | 7篇 |
1983年 | 7篇 |
1982年 | 8篇 |
1981年 | 4篇 |
1980年 | 5篇 |
1978年 | 12篇 |
1977年 | 9篇 |
1976年 | 8篇 |
1975年 | 5篇 |
1964年 | 5篇 |
1963年 | 4篇 |
排序方式: 共有1061条查询结果,搜索用时 15 毫秒
61.
Simon Jackson BA BM BCh Tony Hollingworth FRCS MRCOG PhD Marion Macpherson MRCOG MD 《The Australian & New Zealand journal of obstetrics & gynaecology》1993,33(2):214-215
Summary: A case report is described in which abdominal pregnancy was misdiagnosed by ultrasound scanning as a pregnancy within a horn of a bicornuate uterus. Two serum alpha fetoprotein (SAFP) results were greatly elevated and an amniocentesis was performed, the liquor alpha fetoprotein (LAFP) and karyotype were normal. Elective Caesarean section was performed at 38 weeks for a persistent transverse lie and an abdominal pregnancy was found. The outcome was excellent for both the mother and child.
This is the first reported case of amniocentesis and measurement of LAFP in an abdominal pregnancy and confirms abdominal pregnancy as a rare cause of an elevated SAFP. 相似文献
This is the first reported case of amniocentesis and measurement of LAFP in an abdominal pregnancy and confirms abdominal pregnancy as a rare cause of an elevated SAFP. 相似文献
62.
The main purpose of this study was to compare rectal and axillary temperature measurements in African children. Altogether 573 sick children were seen in an outpatient setting in rural West Africa. Rectal and axillary temperatures were measured and the parent or guardian was asked if they thought that the child had a raised body temperature. Normal ranges were defined from an age matched population of 203 healthy children. A raised axillary temperature predicted a raised rectal temperature with a sensitivity of 98% and a specificity of 88%. The parents' impression that their child had a fever was a less sensitive (89%) and less specific (59%) indicator of raised rectal temperature. A raised axillary temperature is a good screening test for a raised rectal temperature in African children. 相似文献
63.
Radiographs, computed tomograms, and radionuclide bone scans were obtained preoperatively in three children with fibromatosis involving the bones and soft tissues of the extremities. Two of the children had identical scar-like bone lesions of the proximal tibia, which, to the authors' knowledge, have not been reported before in this disease. The lesions recurred in two children. 相似文献
64.
Emphysema in the renal allograft 总被引:1,自引:0,他引:1
Two diabetic patients in whom emphysematous pyelonephritis developed after renal transplantation are described. Clinical recognition of this unusual and serious infection is masked by the effects of immunosuppression. Abdominal radiographic, ultrasound, and computed tomography findings are discussed. The clinical presentation includes urinary tract infection, sepsis, and acute tubular malfunction of the allograft in insulin-dependent diabetics. 相似文献
65.
66.
Tagat JR McCombie SW Nazareno D Labroli MA Xiao Y Steensma RW Strizki JM Baroudy BM Cox K Lachowicz J Varty G Watkins R 《Journal of medicinal chemistry》2004,47(10):2405-2408
The nature and the size of the benzylic substituent are shown to be the key to controlling receptor selectivity (CCR5 vs M1, M2) and potency in the title compounds. Optimization of the lead benzylic methyl compound 3 led to the methoxymethyl analogue 30, which had excellent receptor selectivity and oral bioavailability in rats and monkeys. Compound 30 (Sch-417690/Sch-D), a potent inhibitor of HIV-1 entry into target cells, is currently in clinical trials. 相似文献
67.
Background
Anxiety and depression co-occur in children and adolescents with anxiety commonly preceding depression. Although there is some evidence to suggest that the association between early anxiety and later depression is explained by a shared genetic aetiology, the contribution of environmental factors is less well examined and it is unknown whether anxiety itself is a phenotypic risk factor for later depression. These explanations of the association between early anxiety and later depression were evaluated. 相似文献68.
69.
70.