His love for mountain climbing is so great that he kept on climbing mountains even after this experience. 他如此热爱爬山以至于在这次经历后依然继续爬山。

点拨：①意为"如此……以至于……"。

He is so young that he can't go to school.

②为动词短语，意为"坚持做某事"。

He kept on studying until 11: 00 last night.