原文：老年人有长处，但也有很大的弱点——老年人容易固执，因此老年人也要有点自觉性。
译文：Old people have strengths but also great weaknesses—they are easy to be stubborn, for example—and they should be aware of that.
改译：

【正确答案】Old people have strengths but also great weaknesses—they tend to be stubborn, for example—and they should be aware of that.

【答案解析】 原译文对“容易……”的翻译不够准确，在此表示“倾向于”而非“没有困难”，而英语表示“容易……，倾向于……”时用词组tend to...。