对朋友好一点，冷冰冰的家伙是交不到朋友的。来个暖心测试，测测你是个热心肠的人吗？

部分参考文献：

[1] Richard, Elardo, Robert, et al. The Relation of Infants' Home Environments to Mental Test Performance from Six to Thirty-Six Months: A Longitudinal Analysis[J]. Child Development, 1975.