Small question 1: Living in a foreign country; thoughts and feelings of loneliness and homesickness.
Quiz 1: Put aside yourself, start with the other person, and imagine the situation when your relatives in your hometown miss you thousands of miles away.
Small topic 1: From "The hotel is so cold that I can't sleep alone", it can be seen that this is a New Year's Eve night. The poet looks at every household outside with bright lights and a happy gathering, but he is far away from his family and lives in a guest house. The three words "turning to sadness" describe the author's loneliness when he was alone on New Year's Eve; his longing for his relatives in his hometown thousands of miles away; and his sigh at the rapid passage of time.
Quiz 2: Opposite writing method. Put yourself aside and write opposite. The third sentence means: "My relatives in my hometown must be thinking of me thousands of miles away on this New Year's Eve, thinking about where I will end up tonight, and how I will spend tonight alone." In fact, This is also a manifestation of "missing hometown for thousands of miles".
The poet did not express his longing for his hometown directly, but expressed it more implicitly and euphemistically