全文获取类型
收费全文 | 718046篇 |
免费 | 49436篇 |
国内免费 | 1351篇 |
专业分类
耳鼻咽喉 | 9372篇 |
儿科学 | 23510篇 |
妇产科学 | 17718篇 |
基础医学 | 111843篇 |
口腔科学 | 20294篇 |
临床医学 | 64469篇 |
内科学 | 137485篇 |
皮肤病学 | 16598篇 |
神经病学 | 50207篇 |
特种医学 | 26272篇 |
外国民族医学 | 76篇 |
外科学 | 106744篇 |
综合类 | 14865篇 |
现状与发展 | 2篇 |
一般理论 | 163篇 |
预防医学 | 51712篇 |
眼科学 | 16438篇 |
药学 | 54630篇 |
3篇 | |
中国医学 | 2372篇 |
肿瘤学 | 44060篇 |
出版年
2021年 | 5653篇 |
2018年 | 8060篇 |
2017年 | 6265篇 |
2016年 | 7002篇 |
2015年 | 7740篇 |
2014年 | 10505篇 |
2013年 | 15695篇 |
2012年 | 21041篇 |
2011年 | 22072篇 |
2010年 | 13052篇 |
2009年 | 12239篇 |
2008年 | 20543篇 |
2007年 | 22119篇 |
2006年 | 22478篇 |
2005年 | 21041篇 |
2004年 | 20540篇 |
2003年 | 19533篇 |
2002年 | 18978篇 |
2001年 | 36752篇 |
2000年 | 37318篇 |
1999年 | 30761篇 |
1998年 | 8022篇 |
1997年 | 6808篇 |
1996年 | 7094篇 |
1995年 | 6727篇 |
1994年 | 6189篇 |
1993年 | 5667篇 |
1992年 | 23231篇 |
1991年 | 23164篇 |
1990年 | 22559篇 |
1989年 | 22318篇 |
1988年 | 20259篇 |
1987年 | 19663篇 |
1986年 | 18688篇 |
1985年 | 17538篇 |
1984年 | 12821篇 |
1983年 | 10863篇 |
1982年 | 5983篇 |
1979年 | 11639篇 |
1978年 | 8184篇 |
1977年 | 6882篇 |
1976年 | 6645篇 |
1975年 | 7313篇 |
1974年 | 8555篇 |
1973年 | 8214篇 |
1972年 | 7707篇 |
1971年 | 7175篇 |
1970年 | 6915篇 |
1969年 | 6345篇 |
1968年 | 5818篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
Clinical versus ultrasonographic evaluation of scrotal disorders 总被引:1,自引:0,他引:1
B Kromann-Andersen L B Hansen P N Larsen K Lawetz P Lynge D Lysen S P Nielsen K H Stockholm P Foged 《British journal of urology》1988,61(4):350-353
Clinical and ultrasonographic examinations of scrotal disorders were compared in 166 patients in order to determine their ability to distinguish between those diseases requiring surgery and those requiring clinical follow-up only. Ultrasound examinations were efficient in discriminating between normal and pathological findings. Extra-testicular lesions were readily differentiated from testicular ones. Although both clinical and ultrasonographic examinations had high sensitivity (90%) in detecting testicular cancer, the number of false positive findings was smaller after ultrasound examination. This gave a predictive value of a positive test of 53% after ultrasound examination but only 33% after clinical examination. Ultrasound examination may, therefore, reduce the number of surgical explorations in the scrotum and should be performed in patients with suspected testicular pathology based on history and palpatory findings. 相似文献
42.
43.
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
44.
45.
46.
47.
48.
49.
SRIVASTAVA Z. I.; MATHUR N.; RASTOGI S. K.; GUPTA B. N. 《Occupational medicine (Oxford, England)》1988,38(4):134-136
Eighty-nine cases of chronic bronchitis were matched against167 asymptomatic controls from the glass bangle industry ofFirozabad. Factors of age, social status, smoking habit andduration of exposure were studied. Duration of exposure wasfound to be a factor contributing significantly to the causationof disease.
Requests for reprints should be addressed to: Dr B. N. Gupta, Division of Epidemilogy, Industrial Toxicology Research Centre, Mahatma Gandhi Marg, Lucknow P.O. Box 80, 226001, India 相似文献
50.