A new study says that American children have exciting after-school life. Many junior and senior students have a lot of interesting things to do in their free time. About 57% students have activities every day. 82% students have activities at least four times a week. American students spend their free time doing sports or enjoying arts, music and dancing. They like to have fun outside school because they can make a lot of friends during their activities.

阅读材料，回答问题。

材料一：随着“互联网+”时代的到来，越来越多的私家车主通过“优步”“滴滴”等互联网软件，轻松加入“专车”司机的行列。“专车”凭借实惠的价格、便捷的预约和支付方式、优质的服务、充足的车源等优点，备受消费者青睐。

材料二：“专车”准入门槛低，私家车的司机资质、车辆状况都难以确保，易出事故，一旦发生纠纷，乘客投诉无门；就目前我国法律规定而言，“专车”因无营运许可而涉嫌违法营运。方兴未艾的“专车”成了无证经营的“黑车”，处境尴尬。

作者通过____手法使读者体会到这首歌强大的感染力。

严复被鲁迅先生称为中国“十九世纪末最敏感的人”，因为他(    )