用多水平模型(Mutilevel modeling, MLM)进行了数据分析，投稿以后，审稿人问模型的拟合情况和是否有多重共线性问题，原文是：The results section has major issues in the reporting of the MLM. How was the model fit? Did you check for multicollinearity assumptions?之前看有关多水平模型的书和文献时，没有看到有提过类似问题的，所以不太清楚该怎么回答，求大神指点！