医生警告他关于毒瘾的危险。

The doctor warned him about the dangers of drug ___addiction.

她为自己对酒精的成瘾寻求了帮助。

She sought help for her ___addiction to alcohol.

他对电脑游戏的沉迷意味着他在室内花费了太多时间。

His ___addiction to computer games means he is spending far too much time indoors.