他们应该避免过多使用手机，并且在睡觉前喝点牛奶之类的东西。

They should avoid using mobile phones too much, and drink something like milk before going to bed.

youdao

他们应该避免过多使用手机，并且在睡觉前喝点牛奶之类的东西。

They should avoid using mobile phones too much, and drink something like milk before going to bed.

youdao