Many years ago, in a small town, there lived a doctor. He was good and kind. At any time of day and night, he was always ready to go and help sick people. Every one in the town liked him and people always went to him when there was anything wrong with them.

    But many years went past and the doctor became old. He began to lose his memory (记忆). This made him do foolish things sometimes. When people noticed this, they did not go to him any more. "He may give us the wrong medicine," they said and they were afraid.

    "Why does no one come to me now?" he wondered. But no one wanted to tell him because they did not want to hurt the good old man, so they said, "You have cured (治好) all the sick people in the town. There is no one sick now." The doctor was pleased when he heard that and they went away happily.