全文获取类型
收费全文 | 1279470篇 |
免费 | 93051篇 |
国内免费 | 2003篇 |
专业分类
耳鼻咽喉 | 18195篇 |
儿科学 | 42353篇 |
妇产科学 | 37955篇 |
基础医学 | 187367篇 |
口腔科学 | 35420篇 |
临床医学 | 108437篇 |
内科学 | 252070篇 |
皮肤病学 | 26510篇 |
神经病学 | 99471篇 |
特种医学 | 50098篇 |
外国民族医学 | 366篇 |
外科学 | 197953篇 |
综合类 | 26574篇 |
现状与发展 | 1篇 |
一般理论 | 300篇 |
预防医学 | 92897篇 |
眼科学 | 29107篇 |
药学 | 97970篇 |
1篇 | |
中国医学 | 2514篇 |
肿瘤学 | 68965篇 |
出版年
2018年 | 11894篇 |
2015年 | 11708篇 |
2014年 | 16110篇 |
2013年 | 24491篇 |
2012年 | 33730篇 |
2011年 | 36142篇 |
2010年 | 21323篇 |
2009年 | 20130篇 |
2008年 | 35130篇 |
2007年 | 38090篇 |
2006年 | 38654篇 |
2005年 | 37960篇 |
2004年 | 36512篇 |
2003年 | 35493篇 |
2002年 | 35026篇 |
2001年 | 58141篇 |
2000年 | 59622篇 |
1999年 | 50733篇 |
1998年 | 14254篇 |
1997年 | 12829篇 |
1996年 | 13098篇 |
1995年 | 12361篇 |
1994年 | 11770篇 |
1993年 | 10884篇 |
1992年 | 41026篇 |
1991年 | 40393篇 |
1990年 | 39921篇 |
1989年 | 38744篇 |
1988年 | 36133篇 |
1987年 | 35383篇 |
1986年 | 33754篇 |
1985年 | 32169篇 |
1984年 | 23954篇 |
1983年 | 20834篇 |
1982年 | 12391篇 |
1981年 | 10941篇 |
1980年 | 10221篇 |
1979年 | 22654篇 |
1978年 | 15897篇 |
1977年 | 13742篇 |
1976年 | 12976篇 |
1975年 | 14214篇 |
1974年 | 16701篇 |
1973年 | 16082篇 |
1972年 | 15327篇 |
1971年 | 14242篇 |
1970年 | 13223篇 |
1969年 | 12742篇 |
1968年 | 11990篇 |
1967年 | 10484篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Twenty-four-hour intragastric acidity and clinical trial of bedtime enprostil 70 μg compared with ranitidine 300 mg in duodenal ulcer 总被引:2,自引:2,他引:0
R. P. WALT R. E. POUNDER C. J. HAWKEY I. A. SANTANA K. W. SOMERVILLE R. F. A. LOGAN R. G. LONG M. J. S. LANGMAN 《Alimentary pharmacology & therapeutics》1987,1(2):161-166
The effects of bedtime 70 micrograms and twice daily 35 micrograms doses of enprostil on 24-hour intragastric acidity were investigated in nine duodenal ulcer patients in remission. Median nocturnal acidity decreased significantly by 30% with 35 micrograms twice daily, and by 48% with 70 micrograms at bedtime. In a clinical trial using bedtime dosing, 102 duodenal ulcer patients randomly received either ranitidine 300 mg or enprostil 70 micrograms. More ulcers healed after 4 and 8 weeks treatment with ranitidine than with enprostil (76% ranitidine vs 52% enprostil, at 4 weeks p = 0.0065 and 94% vs 68%, respectively at 8 weeks, P = 0.0007). However, 6 months after cessation of treatment there was no material difference in overall outcome. Despite combining mucosal protection with acid inhibition enprostil treatment conferred no advantage over simple acid inhibition. 相似文献
992.
993.
G Gács 《Orvosi hetilap》1987,128(5):243-246
994.
J R Parikh H Venkatakrishna-Bhatt G M Panchal 《American journal of industrial medicine》1987,12(4):439-443
Blood histamine levels were measured by the bioassay of histamine (on an isolated strip of guinea pig ileum) in workers exposed to cotton dust in a textile mill in Ahmedabad. Byssinotic subjects showed very high levels of blood histamine as compared to nonbyssinotic and control subjects. The blood histamine levels were not well correlated to the dust concentrations or duration of exposure but rather to the day of the week (ie, first, second, third, etc., after weekend break) on which the samples were collected. The blood histamine levels were high on the first day of the work week, when byssinotics complained most of their symptoms. 相似文献
995.
An early accurate diagnosis of subungual melanoma depends upon an alert podiatric physician. Clinically, the lesion is often easily misdiagnosed and mistreated because of its resemblance to benign nail conditions. This paper discusses the incidence, histology, clinical findings, diagnosis, and treatment of this malignant lesion. An illustrative case report is presented. 相似文献
996.
M G Wise 《Health & social work》1986,11(1):36-41
The vastly increased use of prescribed and nonprescribed drugs in this society means that even such traditional social work activities as assessment and advocacy now frequently require a knowledge of the effects of drugs. Integrating a knowledge of basic concepts of pharmacology into practice will enable the social worker to help clients more effectively and to improve the health care they receive. 相似文献
997.
998.
Seventy-four patients with impaired renal function were investigated by ultrasound. By assessing renal length, renal echogenicity and collecting system dilatation, one can establish whether renal function is impaired by chronic or acute renal changes or by obstructive changes. 相似文献
999.