摘要
ONE Sunday morning, I noticed some people gathered at a clearing outside a school in which my family had an apartment. Feeling curious, I joined them to find that some young dentists, wearing their white coats, were offering free consultations for people. They were selling toothbrushes and dental floss at the same time. One of my teeth was bothering me. It always felt odd when I bit something cold. I consulted with a young dentist, who was wearing a pair of glasses. He asked me many questions like when had it begun to hurt, if I felt the pain, how long it had been since I had it filled the previous time. He asked me to open my mouth and checked the tooth carefully. "You should have
