【正确答案】Generally speaking, there are two kinds of people who choose to live alone on purpose. The first group of them are artists. They enjoy living in solitude. I know a writer who's got used to staying up late so as to concentrate on his reading, writing and thinking without fear of being interrupted by others. He regards Thoreau's remark as his motto: "I never found the companion that was so companionable as solitude." The second group of people include those who've got disappointment from their life. There is a story reported in a magazine that a woman has been living alone ever since her husband and son died in a plane crash  several  years  ago.  She cannot recover from her sorrow  and remained disappointed with life.