1. An individual’s genetics has a big influence on their height, but once you average over whole populations, genetics plays a less key role.
2. Since the former is most common among those inclined towards indifferent relationships, their predominance can bolster individuals’ sense of self-worth.
3. Even if people are able to economically support a retirement at 65, over thirty years of potential inactivity is harmful to cognitive(认知的) and emotional vitality.
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