get the wrong end of the stick

例句：

1. 1.He got the wrong end of the stick when he tried to solve the problem.
   他试图解决这个问题时弄错了重点。
2. 2. She was so upset that she got the wrong end of the stick and blamed him for everything.
   她非常生气，结果把责任都怪在了他的头上。
3. 3. The teacher warned us not to get the wrong end of the stick by asking questions that were too obvious.
   老师警告我们不要问那些太明显的问题，否则会弄错重点。