1·欣赏幽默，会意幽默。
Appreciates and responds to humor. 068.
2·通过除去移民因素，合并人口较少的县，他们把美国的3141个县分为了2068个“县级单位”；再调查每个县的死亡率。
They looked at death rates by county, having corrected for migration and merged sparsely populated ones so that America's 3, 141 counties became 2, 068 “county units”.