新视野大学英语句子解析 第1册 Unit 10A:Language Point 26
Language Point 26
David Ogilvy, ..., clarified this point to his newly appointed office heads by sending each of them a Russian nesting doll with five progressively smaller figures inside. (Para. 10)
Meaning: David Ogilvy, ..., made this point clear to his newly appointed office heads by sending each of them a Russian nesting doll which contained five figures that were doll by doll smaller.
Here "this point" refers to what has been said in the last sentence of the previous paragraph.