全文获取类型
收费全文 | 706篇 |
免费 | 47篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 49篇 |
妇产科学 | 5篇 |
基础医学 | 77篇 |
口腔科学 | 36篇 |
临床医学 | 80篇 |
内科学 | 138篇 |
皮肤病学 | 20篇 |
神经病学 | 39篇 |
特种医学 | 184篇 |
外科学 | 43篇 |
综合类 | 25篇 |
预防医学 | 28篇 |
眼科学 | 3篇 |
药学 | 14篇 |
肿瘤学 | 26篇 |
出版年
2018年 | 6篇 |
2017年 | 5篇 |
2016年 | 15篇 |
2015年 | 9篇 |
2014年 | 15篇 |
2013年 | 11篇 |
2012年 | 7篇 |
2011年 | 10篇 |
2010年 | 22篇 |
2009年 | 18篇 |
2008年 | 20篇 |
2007年 | 17篇 |
2006年 | 13篇 |
2005年 | 14篇 |
2004年 | 11篇 |
2003年 | 12篇 |
2002年 | 12篇 |
2001年 | 16篇 |
2000年 | 13篇 |
1999年 | 10篇 |
1998年 | 23篇 |
1997年 | 38篇 |
1996年 | 29篇 |
1995年 | 31篇 |
1994年 | 20篇 |
1993年 | 27篇 |
1992年 | 19篇 |
1991年 | 16篇 |
1990年 | 14篇 |
1989年 | 23篇 |
1988年 | 26篇 |
1987年 | 33篇 |
1986年 | 25篇 |
1985年 | 14篇 |
1984年 | 9篇 |
1983年 | 11篇 |
1982年 | 8篇 |
1981年 | 20篇 |
1980年 | 13篇 |
1979年 | 9篇 |
1978年 | 7篇 |
1977年 | 9篇 |
1976年 | 19篇 |
1975年 | 9篇 |
1973年 | 4篇 |
1972年 | 3篇 |
1968年 | 5篇 |
1934年 | 4篇 |
1933年 | 3篇 |
1927年 | 4篇 |
排序方式: 共有768条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
Cognitive Performance Scores for the Pediatric Automated Neuropsychological Assessment Metrics in Childhood‐Onset Systemic Lupus Erythematosus 下载免费PDF全文
65.
2010年8月,美国心脏病学会基金会(ACCF)、美国心脏学会(AHA)共同发布了美国食品药品管理局(FDA)关于氯吡格雷的"盒装警告",主要针对医师和患者提出建议,其内容包括:通过检测药物基因型以明确患者氯吡格雷的代谢变化,患者不良反应的风险,基因多态性对氯吡格雷的代谢及临床影响。 相似文献
66.
P Dutta U Mitra DR Saha SK Niyogi B Manna SK Bhattacharya 《Acta paediatrica (Oslo, Norway : 1992)》1999,88(8):822-826
A hospital-based case-control study was carried out to clarify the characteristics of mucoid presentation of acute enterocolitis in children. One hundred sixty-eight cases of acute mucoid enterocolitis (study population) were compared with 200 cases of watery diarrhoea and 118 cases of blood dysentery (control groups) on the basis of clinical characteristics and findings on stool examination. Study and control groups were comparable with respect to age, body weight and nutritional status. There was no significant difference in clinical characteristics (duration of diarrhoea, stool frequency, presence of vomiting, fever and dehydration) between patients suffering from mucoid enterocolitis and blood dysentery. However, watery diarrhoea patients had significantly high frequencies of vomiting (p = 0.00001) and dehydration (p 相似文献
67.
DR Brewster MJ Manary IS Menzies EV O'Loughlin RL Henry 《Archives of disease in childhood》1997,76(3):236-241
Intestinal permeability can be assessed non-invasively using the lactulose-rhamnose (L-R) test, which is a reliable measure of small intestinal integrity. AIMS: To determine risk factors for abnormal intestinal permeability in kwashiorkor, and to measure changes in L-R ratios with inpatient rehabilitation. DESIGN: A case-control study of 149 kwashiorkor cases and 45 hospital controls. The L-R test was adapted to study kwashiorkor in Malawi, with testing at weekly intervals during nutritional rehabilitation. Urine sugars were measured by thin layer chromatography in London. RESULTS: The initial geometric mean L-R ratios (x100) (with 95% confidence interval) in kwashiorkor were 17.3 (15.0 to 19.8) compared with 7.0 (5.6 to 8.7) for controls. Normal ratios are < 5, so the high ratios in controls indicate tropical enteropathy syndrome. Abnormal permeability in kwashiorkor was associated with death, oliguria, sepsis, diarrhoea, wasting and young age. Diarrhoea and death were associated with both decreased L-rhamnose absorption (diminished absorptive surface area) and increased lactulose permeation (impaired barrier function) whereas nutritional wasting affected only L-rhamnose absorption. Despite, clinical recovery, mean L-R ratios improved little on treatment, with mean weekly ratios of 16.3 (14.0 to 19.0), 13.3 (11.1 to 15.9) and 14.4 (11.0 to 18.8). CONCLUSION: Abnormal intestinal permeability in kwashiorkor correlates with disease severity, and improves only slowly with nutritional rehabilitation. 相似文献
68.
由于采用血浆置换(PE)治疗血栓性血小板减少性紫癜溶血性尿毒综合征(TTP HUS)频率的增加,PE引起的并发症也成为制定治疗方案时需要考虑的因素。由于TTP HUS的诊断常常是不确定的,掌握PE治疗利弊之间的平衡已成为制定适当治疗方案的焦点。之前,我们于1996年~2002年间曾两次报道 相似文献
69.
70.
Lizhu Chen MD Ailu Cai DR Xiaoguang Wang MD Bing Wang MD Jingyu Li MD 《Journal of clinical ultrasound : JCU》2010,38(5):279-282
We report the prenatal diagnosis of 6 cases of Prune‐belly syndrome in the 2nd trimester. The sonographic diagnosis was based on the findings of oligohydramnios, renal anomalies, and a lower abdominal cystic mass representing the abnormal dilatation of the bladder on conventional 2‐dimensional sonographic examination. We discuss the role of Doppler imaging and 3‐dimensional sonography as complementary methods to conventional sonography. Four of our 6 cases were confirmed with associated defects. © 2009 Wiley Periodicals, Inc. J Clin Ultrasound, 2010 相似文献