节日若是Day,表示具体某天,一般用on,如on Christmas Day,(但要注意是at Christmas),on Children's Day,on Dragon Boat Day,on Christmas Eve<br>另外,表示具体到某天的某段时间也是用on,如on the morning of New Year's Day<br>而festival一般是at,如at Spring Festival
<pre>建议磁共振检查,看看韧带是否损伤!<br/>上海新华医院-骨科-王建华副主任医师</pre>