R1: Q1: It is hard to understand what Remark 6 conveys

R1: Q1: It is hard to understand what Remark 6 conveys. A: Y es, the error bound condition refers to the inequality in Lemma 1. Lemma 1 implies that the error bound condition R1: Q2: how the bound can affect or guide a specific choice of K in stagewise SGD. Theoretically, the testing error bound (e.g., In practice, it is just a small number. R1: Q3: It might be better to use "ST ART" in the paper title and Figure 1, instead of "SGD". We will make the change.