纯粹理性批判（第1版）、未来形而上学导论、道德形而上学的奠基、自然科学的形而上学初始根据

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Be social. People with more social support tend to live longer than those who are more isolated, and this is true even after accounting for your overall level of health. Suggested reading: How to Talk to Anyone
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Ask yourself: How confident are you in your abilities to make decisions for yourself? Next