有一个恰当的例子，……
点睛本句型是典型的引出例子的句型，它适用于各种文体及各种类型的文章。
a case in point是固定表达，意为“例子；恰如其分的例子”。如：
A case in point of this is the steady increase in crime in New York City. 这方面很好的例子就是，纽约市的犯罪率在不断地上升。
句型拓展We may cite another instance of Tom's selfishness and unwillingness to help his friend. 我们还有其他证据可以证明汤姆的自私和不愿帮助朋友。
A number of further facts may be added to illustrate that racialists wish to prove their superiority. 还有更多事实可以表明，种族主义者们想要证明他们的优越性。
