night前用什麼介詞

前用介詞at，例如：

1、A tripod also lets you shoot long exposures at night.三腳架也可以讓你在晚上長時間曝光。

2、If headaches only occur at night， lack of fresh air and oxygen is often the cause.如果只是在晚上頭疼，那常常是由於缺乏新鮮空氣和氧氣的緣故。

3、She doesn't like to walk home late at night.她不喜歡深夜步行回家。