What does the last section of Li Shizhen’s overnight stay in an ancient temple tell us in the fourth grade Chinese language course 17?

The words filled in show the dilapidation of the ancient temple. The purpose of describing the ruins of the ancient temple in such detail is to highlight Li Shizhen's dedicated and tireless spirit of serving the people.

2........................................ ........... These two sentences embody the spirit of master and apprentice Li Shizhen to take pleasure in suffering in order to revise the "Compendium of Materia Medica" to benefit the people.

3........................................ ......... The last natural paragraph of the text is to highlight the spirit of Li Shizhen and his apprentice who worked tirelessly to revise the "Compendium of Materia Medica" to benefit the people.