An international study showed that teenagers living with both parents are less likely to suffer from alcohol and drug problems but a strong maternal bond is the most effective barrier to substance abuse.

• 一项国际研究表明，生活在双亲家庭的青少年发生酗酒和吸毒现象的几率比较小，不过这要归功于母亲的严格管教，这可是杜绝青少年不良现象的最有效方法。