Why are 4 lines executed in the end?

Question

Why are there still these four lines in the final result?

I am Goudan, I haven’t executed it yet 1
I am Goudan, I haven’t executed it yet 2
I am Goudan, I haven’t executed 3
yet. I’m a bitch. I haven’t executed 4

yet.

Answer 1

The fourth execution of dg() is completed. The code of the third dg() has not been executed yet. Just return to the last execution. That is, the third time