全文获取类型
收费全文 | 705857篇 |
免费 | 48875篇 |
国内免费 | 1304篇 |
专业分类
耳鼻咽喉 | 9166篇 |
儿科学 | 23267篇 |
妇产科学 | 17603篇 |
基础医学 | 110415篇 |
口腔科学 | 19956篇 |
临床医学 | 63752篇 |
内科学 | 134287篇 |
皮肤病学 | 16159篇 |
神经病学 | 49462篇 |
特种医学 | 25738篇 |
外国民族医学 | 76篇 |
外科学 | 104460篇 |
综合类 | 14818篇 |
现状与发展 | 2篇 |
一般理论 | 160篇 |
预防医学 | 51384篇 |
眼科学 | 16318篇 |
药学 | 53977篇 |
3篇 | |
中国医学 | 2359篇 |
肿瘤学 | 42674篇 |
出版年
2019年 | 5431篇 |
2018年 | 7858篇 |
2017年 | 6106篇 |
2016年 | 6819篇 |
2015年 | 7549篇 |
2014年 | 10268篇 |
2013年 | 15383篇 |
2012年 | 20496篇 |
2011年 | 21489篇 |
2010年 | 12718篇 |
2009年 | 11931篇 |
2008年 | 19990篇 |
2007年 | 21508篇 |
2006年 | 21901篇 |
2005年 | 20438篇 |
2004年 | 19988篇 |
2003年 | 18943篇 |
2002年 | 18451篇 |
2001年 | 36330篇 |
2000年 | 36897篇 |
1999年 | 30383篇 |
1998年 | 7877篇 |
1997年 | 6663篇 |
1996年 | 6971篇 |
1995年 | 6628篇 |
1994年 | 6103篇 |
1993年 | 5590篇 |
1992年 | 22969篇 |
1991年 | 22925篇 |
1990年 | 22310篇 |
1989年 | 22078篇 |
1988年 | 20035篇 |
1987年 | 19417篇 |
1986年 | 18467篇 |
1985年 | 17305篇 |
1984年 | 12697篇 |
1983年 | 10741篇 |
1982年 | 5921篇 |
1979年 | 11518篇 |
1978年 | 8128篇 |
1977年 | 6832篇 |
1976年 | 6594篇 |
1975年 | 7268篇 |
1974年 | 8498篇 |
1973年 | 8141篇 |
1972年 | 7658篇 |
1971年 | 7127篇 |
1970年 | 6878篇 |
1969年 | 6306篇 |
1968年 | 5780篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
74.
Pankaj Hari Anand Srivastava Arun Kumar Gupta Rajendra N. Srivastava 《Pediatric nephrology (Berlin, Germany)》1997,11(4):497-498
Acute renal failure (ARF) developed in a 7-week-old infant due to bilateral candidal bezoars (fungal balls) causing obstruction
at the pelviureteric junction. The baby was born at term with an appropriate birthweight, and had been treated with broad-spectrum
antibiotics for respiratory distress and septicemia during the 1st week of life. Recovery from ARF followed renal decompression
with bilateral nephrostomy tube placement and parenteral administration of amphotericin B and 5-flucytosine.
Received August 21, 1996; received in revised form and accepted January 3, 1997 相似文献
75.
76.
Spleen sizing by ultrasound in polycythaemia and thrombocythaemia: comparison with SPECT 总被引:3,自引:1,他引:2
M. Messinezy L. M. MacDonald T. O. Nunan N. B. Westwood S. Chinn & T. C. Pearson 《British journal of haematology》1997,98(1):103-107
Detection of non-palpable early splenic enlargement may aid diagnosis of primary polycythaemia (PP) and primary thrombocythaemia (PT). In this study linear spleen sizing by ultrasound has been compared with spleen volume estimation by single photon emission computerized tomography (SPECT) in 26 patients. Spleen length by ultrasound correlated well with SPECT volume estimation.
Ultrasound spleen length was also measured in 60 normal control subjects where the upper limit of the 95% reference range was 11.6 cm. Changes in spleen length with both age and body weight were substantial and overshadowed the imperfect reproducibility of this method. Therefore, interpretation of an individual's measured spleen length should be in relation to that predicted for adults of the same age and weight, particularly at the extremes of the younger, heavier patients and also the older, lighter patients.
Ultrasound spleen lengths of different patient groups (21 PP, 26 PT, 17 idiopathic erythrocytosis, 12 secondary polycythaemia, nine apparent polycythaemia) were compared both using the measured overall reference range and the differences from the values predicted for their age and weight. The comparison showed that almost all patients with PP whose spleens were not palpable had spleen lengths greater than the upper limit for the normal control group, but separation from the other patient groups was incomplete.
Detection of non-palpable splenomegaly by ultrasound length should remain a 'minor' criterion amongst the 'proposed modified diagnostic criteria' of PP. 相似文献
Ultrasound spleen length was also measured in 60 normal control subjects where the upper limit of the 95% reference range was 11.6 cm. Changes in spleen length with both age and body weight were substantial and overshadowed the imperfect reproducibility of this method. Therefore, interpretation of an individual's measured spleen length should be in relation to that predicted for adults of the same age and weight, particularly at the extremes of the younger, heavier patients and also the older, lighter patients.
Ultrasound spleen lengths of different patient groups (21 PP, 26 PT, 17 idiopathic erythrocytosis, 12 secondary polycythaemia, nine apparent polycythaemia) were compared both using the measured overall reference range and the differences from the values predicted for their age and weight. The comparison showed that almost all patients with PP whose spleens were not palpable had spleen lengths greater than the upper limit for the normal control group, but separation from the other patient groups was incomplete.
Detection of non-palpable splenomegaly by ultrasound length should remain a 'minor' criterion amongst the 'proposed modified diagnostic criteria' of PP. 相似文献
77.
78.
79.
80.