Between 61 and 70, a woman is like Canada: self-preserving, but open to meet new people.

年纪61至70岁的女人像加拿大：自守但却敞开大门接纳新人。

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The search for contentment is, therefore, not merely a self-preserving and self-benefiting act, but also a generous gift to the world.

因此，追寻满足不仅是自保与自利的行为，也是献给世界的厚礼。

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The issues surroudning altruism include the following. Given the self-preserving tendency of human nature, how are we to account for the existence of altruism?

下面是利他主义引起的一些争论：如果说人性中有自我保护的倾向，那么我们又该怎样解释利他主义的存在呢？

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