My son was a second-grader. He went to school by bus every day. He was the first student on in the morning, as we were farthest from school, and the last student off in the evening. I was a teacher myself and it was a comfort to realize the school staff (职员) were all working as hard as I was to provide a safe learning environment.
One day I came home from work and waited for my son to get home for a long time. Then I called the school. “Perhaps he’s just a bit late,” said the secretary. “I will call the driver to see if those children are home.” A few minutes later, I answered the phone to hear that the other students were home. Then I called his friends’ parents, to see if perhaps he had gotten off at their stop to play. The answers were all “No.”