You can compare the different language styles used by the characters. Sherlock, for example, is obviously concise, straight to the point, with less redundancy, less tone and unnecessary parts. Brother Mai's speech is very organized, with a beginning and an end. As an executive, his speech will not be too direct, but it will not beat around the bush and cause and effect will be linked. Mrs. Henderson will add kind words, such as dear. This is like the addition or deletion of sentences in the college entrance examination, whether long or short, and the use of prepositions varies from person to person. You can compare English dramas with older themes. The use of prepositions, phrases and sentence patterns is obviously more complicated, or it makes modern English or non-English-speaking learners feel strange, but it is also an English language. You can compare the characteristics and differences.