有这样一个故事：威尔逊要到山里参加为期两天的野营，他自己做了准备工作。妈妈检查他的行李时，发现他没有准备足够的衣服，因为山里要比平原冷得多；而且也没带手电筒，这是野营时必须要带的东西。但妈妈并没有给儿子提示。过了两天，妈妈问回来的儿子：“怎么样，玩得开心? There is such a story: Wilson is going to the mountains to attend a two-day camping, he made preparations for himself. When she checked his luggage, she found he was not getting enough clothes, because the mountains were much colder than the plain, and there was no flashlight, something that they had to bring along while camping. But my mother did not prompt her son. Two days later, my mother asked her son, "How are you doing, have fun?