根据下面一篇短文的内容判断下列句子的正误，正确的用“A”来表示，错误的用“B”来表示。
A young man couldn’t sleep well every night. He was very worried. One day he went to see the doctor. The doctor looked him over carefully. But nothing was wrong with him. The doctor told him to count from 1 to 10 again and again. “Keep doing it until you fall asleep,” the doctor said.
After a few days, the young man came to the doctor again. But to his surprise, the doctor found the young man was even worse than before! “Didn’t you count as I told you?” the doctor asked. “Yes, I did,” the young man answered. “But every time when I reached eight, I couldn’t help jumping(跳) from bed.”
“But why?” the doctor wanted to know. The young man said, “I am a boxer.”(拳击运动员)
小题1:The young man had a very terrible illness(疾病).
小题2:The doctor told him to count numbers from 1 to 1000 .
小题3:After a few days the young man was even worse.
小题4:The young man didn’t do the things that the doctor told him.
小题5:The young man was a boxer.
根管治疗后观察2周无症状，行桩核冠修复后出现咬合痛。X线片：根充恰填，牙周膜间隙增宽。分析最可能的原因是（）