这里有一个问题，即五十岁这个关键时间点。为什么人到了五十岁，就可以为了某个信仰而牺牲生命，并且认为没有留下太多遗憾呢？这可能与古人的预期寿命有关，也与古圣先贤形成的一套生命观有关。
Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00580-2
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Despite the difficult start, the Sniders forged ahead. The couple focused on building the infrastructure required to operate a private island resort; that process took about five years to stabilize, Mark notes.