Answer: A. Mu Dan's poems explore and express "self" in a long-lasting and in-depth way. Poems such as "I" and "The Temptation of the Snake" show Mu Dan's unique exploration and expression of "self". Different from the exaggerated "I" of Guo Moruo's "Tiangu", Xu Zhimo's romantic and passionate "I", and Dai Wangshu's sentimental and self-pitying "I", Mu Dan's "I" is a split, divided person living in a chaotic and dark reality. The incomplete, contradictory and painful "I". B． The love subjects in love are no longer unified and affectionate emotional subjects. They are trapped between spirit and body, reason and emotion, time and space, me and you (two opposite subjects in love), human beings and the Creator. Amid differences and contradictions, the lyrical subject is split and painful. C. Mu Dan's "I" is deeply rooted in Chinese reality. Exploring the individual in the reality of social life and recognizing reality in the unfolding of individual life have become the distinctive features of Mu Dan's poetry. D. Mu Dan's self has always been in the midst of painful self-anatomy, dedicated to showing his soul's self-struggle and all kinds of painful and rich experiences, full of the power of deep introspection and speculation.