全文获取类型
收费全文 | 18679篇 |
免费 | 1469篇 |
国内免费 | 43篇 |
专业分类
耳鼻咽喉 | 312篇 |
儿科学 | 393篇 |
妇产科学 | 257篇 |
基础医学 | 2439篇 |
口腔科学 | 551篇 |
临床医学 | 1876篇 |
内科学 | 3817篇 |
皮肤病学 | 241篇 |
神经病学 | 1963篇 |
特种医学 | 709篇 |
外科学 | 2857篇 |
综合类 | 260篇 |
一般理论 | 12篇 |
预防医学 | 1621篇 |
眼科学 | 308篇 |
药学 | 1302篇 |
1篇 | |
中国医学 | 12篇 |
肿瘤学 | 1260篇 |
出版年
2023年 | 105篇 |
2022年 | 152篇 |
2021年 | 323篇 |
2020年 | 244篇 |
2019年 | 294篇 |
2018年 | 360篇 |
2017年 | 289篇 |
2016年 | 297篇 |
2015年 | 305篇 |
2014年 | 451篇 |
2013年 | 785篇 |
2012年 | 1020篇 |
2011年 | 1097篇 |
2010年 | 627篇 |
2009年 | 605篇 |
2008年 | 1088篇 |
2007年 | 1130篇 |
2006年 | 1187篇 |
2005年 | 1106篇 |
2004年 | 1076篇 |
2003年 | 1082篇 |
2002年 | 1080篇 |
2001年 | 283篇 |
2000年 | 230篇 |
1999年 | 264篇 |
1998年 | 256篇 |
1997年 | 248篇 |
1996年 | 229篇 |
1995年 | 203篇 |
1994年 | 162篇 |
1993年 | 136篇 |
1992年 | 174篇 |
1991年 | 181篇 |
1990年 | 173篇 |
1989年 | 116篇 |
1988年 | 155篇 |
1987年 | 143篇 |
1986年 | 148篇 |
1985年 | 154篇 |
1984年 | 176篇 |
1983年 | 186篇 |
1982年 | 191篇 |
1981年 | 171篇 |
1980年 | 176篇 |
1979年 | 116篇 |
1978年 | 141篇 |
1977年 | 117篇 |
1976年 | 112篇 |
1974年 | 86篇 |
1972年 | 77篇 |
排序方式: 共有10000条查询结果,搜索用时 149 毫秒
1.
2.
3.
4.
Diabetes mellitus(DM) negatively affects the development and progression of chronic liver diseases(CLD) of various etiologies. Concurrent DM and CLD are also associated with worse clinical outcomes with respect to mortality, the occurrence of hepatic decompensation, and the development of hepatocellular carcinoma(HCC). Unfortunately, early diagnosis and optimal treatment of DM can be challenging, due to the lack of established clinical guidelines as well as the medical complexity of this patient population. We conducted an exploratory review of relevant literature to provide an up-to-date review for internists and hepatologists caring for this patient population. We reviewed the epidemiological and pathophysiological associations between DM and CLD, the impact of insulin resistance on the progression and manifestations of CLD, the pathogenesis of hepatogenic diabetes, as well as the practical challenges in diagnosis and monitoring of DM in this patient population. We also reviewed the latest clinical evidence on various pharmacological antihyperglycemic therapies with an emphasis on liver disease-related clinical outcomes. Finally, we proposed an algorithm for managing DM in patients with CLD and discussed the clinical and research questions that remain to be addressed. 相似文献
5.
6.
7.
8.
9.
Relation between energy expenditure and body composition in man: specific energy expenditure in vivo of fat and fat-free tissue 总被引:2,自引:0,他引:2
L Garby J S Garrow B J?rgensen O Lammert K Madsen P S?rensen J Webster 《European journal of clinical nutrition》1988,42(4):301-305
The relationship between energy expenditure and body composition, in terms of fat and fat-free masses, has previously been described by a variety of predictive regression equations with parameters devoid of physiological content. We present here results obtained by calculating the specific energy expenditure, ie, the energy expenditure per unit of mass, of fat and fat-free tissue on the basis of measurements of the total energy expenditure (EE), the masses of fat (FM), and fat-free (FFM) tissue using the following simple model: EE = k1.FM + k2.FFM where k1 and k2 are the specific energy expenditures of fat and fat-free tissue, respectively. The results of observations on 104 women at rest yielded values for k1 and k2 of 0.31 and 1.35 watts/kg of fat and fat-free mass, respectively, with standard errors of estimate of 0.074 and 0.052 watts/kg, respectively. Analysis of several series of measurements, from other sources and on smaller samples of subjects, yielded similar values at rest but with larger standard errors of estimate. Data from subjects performing varying amounts of work in 24-h measurements showed, as expected, larger values for both tissues. The results explain to a very large extent the well-established relation between resting metabolic rate and body weight, ie, a linear relation with a non-zero intercept. The results also offer a clear-cut explanation for the well known difference in energy expenditure between men and women with the same body weight. 相似文献
10.
蒿甲醚引起小鼠体内日本血吸虫和曼氏血吸虫皮层变化1肖树华,沈炳贵,JackHORNER2,BrianACATTO3(中国预防医学科学院寄生虫病研究所,世界卫生组织疟疾、血吸虫病和丝虫病合作中心,上海200025,中国;2DepartmentofCli... 相似文献