With a start, I realized that perhaps the reason for the 4 a.m. wake-up noise was not ordinary rudeness but carefully executed spite: I had not tipped Raoul in Christmases past.

首先，我意识到让人凌晨4点起床的噪音不是普通的无礼，而是精心制造的恶意：在过去的圣诞节里，我没有给拉乌尔小费。