In poetry, imagery is very important. Many images form an artistic conception. In nostalgia, the author uses these images to express his deep longing for his hometown.
From the perspective of word attributes, these words are all numerals plus quantifiers, making the carrier of one's longing for one's hometown more vivid and concrete, making one feel homesick after seeing things.
These words not only show the poet's language skills, but also enhance the phonological beauty of the whole poem.