This poem is about horses, but the author never talks about horses in reality. The author is obviously comparing people with horses. Both AC terms of this question are wrong in not knowing this technology. Item D can relate to the background of poetry writing to develop imagination and association, and know how to describe people with Malay, but it is wrong to understand the theme of poetry. Key sentences such as "It doesn't say a word", "It hangs its head heavily" and "It only swallows tears in its stomach" depict the image of "enduring" rather than "struggling", which is a true portrayal of the tragic image of the disaster-stricken old China people.