在段落一開頭，就用主題句點明其因果關系，然后選用有關材料，客觀的羅列某些原因或結果，以闡述中心思想。

Growing numbers of well-to-do Americans are making the decision to move abroad. They find it impossible in America to walk the streets at night without fear of being raped, mugged, or murdered, nor do they see a way to escape the poisonous air of the cities. They maintain that even American food has become increasingly dangerous to eat. Last but not least, they insist that they are sick of the pace of American life, a pace that leaves no time for relaxation or pleasure.

因果關系常用語匯:

because of, so, owing to, thanks to, thus, as a result of, hence, for this reason, consequently, is caused by, lead to, result in