努力の仕方の時間編2 https://energy.jp/blog/2019/02/12/%e5%8a%aa%e5%8a%9b%e3%81%ae%e4%bb%95%e6%96%b9%e3%81%ae%e6%99%82%e9%96%93%e7%b7%a8%ef%bc%92/