The answer is clear. Doing this problem mainly depends on whether you have enough time and clear thinking. In essence, the most important one is the idea of classified discussion. In addition, you are required to be very familiar with the properties of logarithmic function and exponential function, and very sensitive to E.

Personally, I suggest that when you encounter such problems in the exam, you can classify several situations and write down the known situations in detail, so you can give up. This part of the solution can get a lot of points when everyone is difficult.