全文获取类型
收费全文 | 12526篇 |
免费 | 840篇 |
国内免费 | 34篇 |
专业分类
耳鼻咽喉 | 94篇 |
儿科学 | 376篇 |
妇产科学 | 256篇 |
基础医学 | 1579篇 |
口腔科学 | 452篇 |
临床医学 | 1476篇 |
内科学 | 2468篇 |
皮肤病学 | 197篇 |
神经病学 | 1438篇 |
特种医学 | 559篇 |
外科学 | 1188篇 |
综合类 | 102篇 |
一般理论 | 12篇 |
预防医学 | 1357篇 |
眼科学 | 352篇 |
药学 | 816篇 |
中国医学 | 24篇 |
肿瘤学 | 654篇 |
出版年
2023年 | 132篇 |
2022年 | 248篇 |
2021年 | 462篇 |
2020年 | 274篇 |
2019年 | 359篇 |
2018年 | 405篇 |
2017年 | 313篇 |
2016年 | 337篇 |
2015年 | 370篇 |
2014年 | 505篇 |
2013年 | 599篇 |
2012年 | 941篇 |
2011年 | 937篇 |
2010年 | 513篇 |
2009年 | 416篇 |
2008年 | 665篇 |
2007年 | 668篇 |
2006年 | 589篇 |
2005年 | 522篇 |
2004年 | 448篇 |
2003年 | 381篇 |
2002年 | 370篇 |
2001年 | 181篇 |
2000年 | 166篇 |
1999年 | 149篇 |
1998年 | 66篇 |
1997年 | 47篇 |
1996年 | 60篇 |
1995年 | 43篇 |
1992年 | 114篇 |
1991年 | 115篇 |
1990年 | 129篇 |
1989年 | 129篇 |
1988年 | 122篇 |
1987年 | 131篇 |
1986年 | 154篇 |
1985年 | 129篇 |
1984年 | 85篇 |
1983年 | 92篇 |
1982年 | 62篇 |
1981年 | 53篇 |
1980年 | 52篇 |
1979年 | 95篇 |
1978年 | 78篇 |
1977年 | 62篇 |
1976年 | 49篇 |
1975年 | 47篇 |
1974年 | 55篇 |
1973年 | 52篇 |
1970年 | 43篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
David M. Presby Michael C. Rudolph Vanessa D. Sherk Matthew R. Jackman Rebecca M. Foright Kenneth L. Jones Julie A. Houck Ginger C. Johnson Janine A. Higgins P. Darrell Neufer Robert H. Eckel Paul S. MacLean 《Diabetes》2021,70(4):867
Moderate weight loss improves numerous risk factors for cardiometabolic disease; however, long-term weight loss maintenance (WLM) is often thwarted by metabolic adaptations that suppress energy expenditure and facilitate weight regain. Skeletal muscle has a prominent role in energy homeostasis; therefore, we investigated the effect of WLM and weight regain on skeletal muscle in rodents. In skeletal muscle of obesity-prone rats, WLM reduced fat oxidative capacity and downregulated genes involved in fat metabolism. Interestingly, even after weight was regained, genes involved in fat metabolism were also reduced. We then subjected mice with skeletal muscle lipoprotein lipase overexpression (mCK-hLPL), which augments fat metabolism, to WLM and weight regain and found that mCK-hLPL attenuates weight regain by potentiating energy expenditure. Irrespective of genotype, weight regain suppressed dietary fat oxidation and downregulated genes involved in fat metabolism in skeletal muscle. However, mCK-hLPL mice oxidized more fat throughout weight regain and had greater expression of genes involved in fat metabolism and lower expression of genes involved in carbohydrate metabolism during WLM and regain. In summary, these results suggest that skeletal muscle fat oxidation is reduced during WLM and regain, and therapies that improve skeletal muscle fat metabolism may attenuate rapid weight regain. 相似文献
3.
4.
5.
6.
7.
Ayad Al Darrab Jerome Fan Christopher M B Fernandes Rosanne Zimmerman Rhonda Smith Andrew Worster Teresa Smith Kelly O'Connor 《European journal of emergency medicine》2006,13(1):32-35
STUDY OBJECTIVES: Use of fast track has been shown to improve the emergency department flow of less urgent patients. It has been speculated, however, that this could negatively affect the care of urgent patients. The objective of this study was to determine whether a dedicated fast track for less urgent patients [Canadian Triage and Acuity scale category 4/5 (CTAS 4/5)] affected (1) the time to assessment for urgent patients (CTAS 3), (2) the length of stay for less urgent patients (CTAS 4 and 5), and (3) the left-without-being-seen rate. METHODS: In June 2003, fast track was opened in our emergency department from 13:00 to 19:00 h. A before-after intervention comparison analysis was completed for 1 week in Aug 2002 and the same week in Aug 2003. Data collected included (1) time to assessment of CTAS 3 patients, (2) the length of stay for CTAS 4/5 patients, and (3) percentage of patients who left without being seen. RESULTS: A total of 368 patients were reviewed for 2002 and 380 patients were reviewed for 2003. Median time to assessment of CTAS 3 patients presenting from 13:00 to 19:00 h was reduced from 66 min (Interquartile range: 40, 94 min) in 2002 to 60 min (IQR: 38, 108 min) after fast track was open in 2003 (P = 0.95). Median length of stay of CTAS 4 and 5 patients was reduced from 170 min (IQR: 111, 256 min) to 110 min (IQR: 69, 185 min) (P < 0.001). The overall left-without-being-seen rate decreased from 5% (20/368) to 2% (9/380). CONCLUSION: A dedicated fast track for CTAS 4/5 patients can reduce the length of stay and the left-without-being-seen rate with no impact on CTAS 3 patients seen in the main emergency department. 相似文献
8.
Nawf Sharief Judith E. Kingston Vanessa M. Wright Kate Costeloe 《Pediatric hematology and oncology》1991,8(4):323-327
We describe a familial case of Marfan's syndrome with associated intrathoracic stomach detected during the neonatal period. The patient developed a primitive leukemia at 3 months of age. Acute leukemia in a patient with Marfan's syndrome has not previously been reported. 相似文献
9.
10.