The passengers on the bus watched sympathetically as the attractive young woman with the white cane （拐杖） made her way carefully up the steps. She paid the driver and, using her hands to feel the location of the seats, walked down and found the seat which the driver had told her was empty. Then she settled in.
    It had been a year since Susan, 34, became blind. Due to a medical misdiagnosis, （误诊）she was suddenly thrown into a world of darkness, anger, frustration (挫败) and self-pity. And all she had to cling to （依靠） was her husband, Mark.
Mark was an Air Force officer and he loved Susan with all his heart. He was determined to help his wife gain the strength and confidence. For the first two weeks, Mark accompanied Susan to and from work each day. He taught her how to rely on her other senses, specifically her hearing, to determine where she was and how to adapt herself to the new environment. He helped her befriend the bus drivers who could watch out for her, and save her a seat.
    Finally, Susan decided that she was ready to try the trip on her own.  Monday morning, she said good-bye, and for the first time, they went their separate ways.
On Friday morning, Susan took the bus to work as usual. As she was getting off the bus, the driver said, “Boy, I do envy you.” Susan had no idea what the driver was talking about, and asked, “What do you mean?”