"Thank you" is used not only between friends, but also between parents and children, brother and sisters, husbands and wives.
2
而第二对夫妻的这个数字是妻子68小时,丈夫45小时。
In the second couple, the wife does 68 hr and the husband does 45 hr.
3
研究发现,如果妻子比丈夫大五岁甚至五岁以上,那么他们的离婚概率要比同岁的夫妻高出三倍以上。
They found that if the wife was five or more years older than her husband, they were more than three times as likely to divorce than if they were the same age.