Add sections to the bookbuilder: もう一つの世界は確かに可能だ.... だが、それはどのような種類で、誰が創り出すのか？ ()
With complex structures, e.g., a chapter with subsections, selecting only the chapter is likely to select only the chapter's title, so probably you want to select the chapter and all its subsections.
The text structure is shown below.