呢個研究用八年時間 追蹤咗三萬個美國成年人 研究問嘅問題係 ︰ 「 喺過去嘅一年裡面 ， 你經歷過幾多壓力 ？ 」
The study, which tracked 30,000 United States adults over eight years, asked the question: "How much stress have you experienced in the past year?"