全文获取类型
收费全文 | 2349849篇 |
免费 | 171647篇 |
国内免费 | 3331篇 |
专业分类
耳鼻咽喉 | 32049篇 |
儿科学 | 75892篇 |
妇产科学 | 62685篇 |
基础医学 | 348190篇 |
口腔科学 | 63634篇 |
临床医学 | 211364篇 |
内科学 | 457293篇 |
皮肤病学 | 51727篇 |
神经病学 | 185300篇 |
特种医学 | 88008篇 |
外国民族医学 | 489篇 |
外科学 | 353857篇 |
综合类 | 47510篇 |
现状与发展 | 12篇 |
一般理论 | 848篇 |
预防医学 | 182736篇 |
眼科学 | 54325篇 |
药学 | 175105篇 |
11篇 | |
中国医学 | 4576篇 |
肿瘤学 | 129216篇 |
出版年
2021年 | 18982篇 |
2019年 | 19537篇 |
2018年 | 27057篇 |
2017年 | 20357篇 |
2016年 | 22746篇 |
2015年 | 25638篇 |
2014年 | 36098篇 |
2013年 | 53957篇 |
2012年 | 74677篇 |
2011年 | 79412篇 |
2010年 | 47059篇 |
2009年 | 44573篇 |
2008年 | 74620篇 |
2007年 | 79477篇 |
2006年 | 80300篇 |
2005年 | 77784篇 |
2004年 | 74376篇 |
2003年 | 71697篇 |
2002年 | 69366篇 |
2001年 | 108740篇 |
2000年 | 111451篇 |
1999年 | 93495篇 |
1998年 | 26994篇 |
1997年 | 23658篇 |
1996年 | 24055篇 |
1995年 | 22718篇 |
1994年 | 20895篇 |
1993年 | 19713篇 |
1992年 | 72003篇 |
1991年 | 70071篇 |
1990年 | 68391篇 |
1989年 | 65663篇 |
1988年 | 60303篇 |
1987年 | 59127篇 |
1986年 | 55217篇 |
1985年 | 53005篇 |
1984年 | 39312篇 |
1983年 | 33396篇 |
1982年 | 19860篇 |
1979年 | 35866篇 |
1978年 | 25651篇 |
1977年 | 21230篇 |
1976年 | 20332篇 |
1975年 | 21816篇 |
1974年 | 26148篇 |
1973年 | 24802篇 |
1972年 | 23200篇 |
1971年 | 22037篇 |
1970年 | 20247篇 |
1969年 | 19315篇 |
排序方式: 共有10000条查询结果,搜索用时 113 毫秒
151.
Lipid metabolism and hyperandrogenism. 总被引:1,自引:0,他引:1
R A Wild 《Clinical obstetrics and gynecology》1991,34(4):864-871
Hyperandrogenism and lipid metabolism were shown to be related intimately. Any discussion of the nature of their relationship must include other clinical and metabolic variables such as hyperinsulinemia and UBO. Despite the many correlations among each of these factors, the appropriate sequence in the pathogenesis of these conditions has not been defined. Do conditions that result in insulin resistance (e.g., genetic defects, insulin receptor antibodies, and obesity) also lead to the development of hyperandrogenemia by direct or indirect ovarian stimulation by insulin? Does hyperandrogenism of ovarian or adrenal origin cause abnormal upper body fat distribution, in turn leading to lipid abnormalities and insulin resistance? Regardless of the issue of mechanism of causality, women with hyperandrogenism are thought to be at greater risk for cardiovascular morbidity and mortality than their normoandrogenic counterparts. These women often are obese, hypertensive, and sedentary; ingest diets high in saturated fats; and have glucose intolerance and/or insulin resistance. All these abnormalities are well known independent risk factors for the development of lipid abnormalities and cardiovascular disease. Whether hyperandrogenism is a secondary consequence of any of these or whether it is an independent contributor to lipid aberrations requires future study. Treatment strategies for hyperandrogenic women, however, should not only be directed toward alleviation of the cosmetic problem of hirsutism but also toward the prevention and treatment of cardiovascular morbidity using modalities aimed at eradicating hyperinsulinemia, hypertension, and dyslipidemia. These modalities should include modifications in diet, exercise, and weight in addition to pharmacologic and/or surgical manipulation. Weight reduction will reduce many cardiovascular risk factors. Obesity is easier to target because of the many risk factors that result in it.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
152.
G C Conoscenti S Alberico P Bogatti A Maieron L Fischer Tamaro C Gigli 《Minerva ginecologica》1991,43(12):549-553
The Authors examine the correlation between hypertensive disorders of pregnancy and fetal growth. The results of a study of 342 pregnancies, confirm a significant correlation between hypertension and fetal growth retardation. These findings, so evident in moderate and severe hypertension, have also been confirmed in cases of mild hypertension. The medical treatment also in the pregnancies with mild hypertension, and a larger utilisation of operative deliveries, determined a decrease in perinatal mortality and morbidity. 相似文献
153.
154.
155.
Thirty-nine primary surgical cases for correction of congenital aural atresia were reviewed for complications and long-term hearing results. Hearing averages of 25 dB for mild atresia, 40 dB for moderate atresia, and 46 dB for severe atresia were obtained. Serviceable hearing was achieved in 64% of the cases. The two most frequent complications were stenosis and recurrent infections of the cavity and canal skin, with an incidence of 33% and 31%, respectively. Use of split-thickness instead of full-thickness skin graft was associated with fewer complications. The goal of this review is also to share the experience of the senior author in the management of this complex problem. 相似文献
156.
A. Trovato S. Kirjavainen E. M. Galati A. M. Forestieri L. Iauk 《Phytotherapy research : PTR》1995,9(8):591-593
The decoction of Sclerocarya birroea Hochst. shows hypoglycaemic effects, an increase in plasma IRI in normal rats and an incremented oral-glucose tolerance. The decoction is also active against diet-induced hypercholesterolaemia. 相似文献
157.
158.
159.
160.