It seems easy, but the writer put many different thinking in it to let us think more but in a softy way.它看起来很简单，但是作者放进了很多不同的思路，让我们能够用柔软的角度切入思考。）
【Side effect】: tracheitis, softy ears, visual fatigue. Action resistance. Trauma and bruise may appear on face with seri气管炎、耳根软、视疲劳、行为受阻等。严重不良反应者，可致皮肉损伤。