Post-traumatic stress disorder: It is an ongoing effect of extreme disaster, that is, the idea of continuous, unnecessary, uncontrollable unrelated events after trauma, a strong desire to avoid mentioning events, sleep disorders, society Withdrawal and anxiety disorders with strong alertness. Which of the following are not post-traumatic stress disorders? ['Many American soldiers returning from the Iraqi battlefield suffer from insomnia, anxiety and even severe mental illness.', "Yang Yang was bitten by a dog at the neighbor Aunt Zhang's house when she was young, and never wanted to go to their house again.", 'Xiao Zhang was trapped in the elevator for more than five hours. At that time, he felt that he was not saved. In the end, he actually turned the risk, but since then, Zhang has often dreamed of being trapped in the elevator, and will never dare to take the elevator again.', 'Seeing the scene where his son A Mao was taken away by a wild beast, the unsettled Xianglin ran away and said, "I\'m so stupid, really, I just know that when it snows, the wild beasts eat nothing in the mountains. Come to the village, I don\'t know that there will be spring . ".']