Test analysis: On the basis of reading the whole paragraph quickly and perceiving the general content, this kind of topic should be analyzed, reasoned and judged according to the sentence structure and logical order of the context, and the exclusion method can be used. This passage is selected from Ma Benteng's Zen and Poetry, and discusses that poetry achieves the center of expressing delicate feelings through metaphor and symbol. The second sentence puts forward the center of the discussion, explains it, and cites the poem "Jinse" as evidence. So choose a.