One day an American went to a small town in South America for his holidays. Few people went there because it was far away from the cities. He fell ill（生病） and wanted very much to see a doctor.
The American went to find out how he could find a fine doctor there. A man told him, "That's very easy. If there is a patient（病人） that a doctor can't cure（治愈）, the doctor has to put a balloon over his clinic（诊所）. "
The American thought, "The fewer balloons are, the finer the doctor is." He began to look for the finest doctor along the street. First he found a clinic. There were 20 balloons. After a few minutes he found another one-30 balloons. He thought neither doctor was fine.
At last he found the third clinic. Only 5 balloons were there. He was very happy and went in.
"Wait a minute," said the doctor. "I'm too busy, you know. This clinic opened only yesterday." The American was very much surprised（感到吃惊的） and said to himself, "Where can I find the finest doctor?"
