From the passage,i know that a man fortunately survived in a traffic accident with the help of others'.This reflected the warmth of our society.
In case of emergency,passerbys who witnessed the accident chose to spare no effort to save
the man instead of ignoring him .Despite the terrible situation,they never gave up.Therefore,what impressed me most is their self-sacrifice spirit,which i think account for the survival of the man.
为什么是self-sacrifice spirit