Note on the Refrigerator

Xiao Yu's family has a habit: before leaving the house each day, his mom would stick a note on the refrigerator. Sometimes it would say: "Remember to drink your milk." Sometimes: "Dinner is in the rice cooker." Occasionally, she'd even draw a crooked smiley face. Xiao Yu found these reminders annoying and often tore them off without even reading them. One morning, he noticed there was no note on the refrigerator. Thinking his mom had finally stopped, he left for school as usual. When he got home that evening, there was no dinner on the table, and the kitchen was dark. It was then he remembered his mom had mentioned a few days ago that she'd be away on a business trip today. He opened the refrigerator. Inside was a lunchbox, but the space next to it was empty. Xiao Yu stared blankly for a moment, then took out his phone and sent a message: "Mom, why didn't you leave a note today?" A few minutes later, his mom replied: "I didn't write one today because I was afraid you'd find it bothersome." Then, another photo arrived. The picture showed his mom's desk in a hotel room, with a note placed on it: "Xiao Yu, remember to eat properly. Don't just grab anything." Xiao Yu smiled as he looked at the message. He then picked up a pen and stuck a new note on the refrigerator: "Mom, remember to eat well while you're on your trip. I'll take care of myself too."