The reviewer's comment:

This study selected an O2O community to collect data. The sample representativeness should be further examined.

In our study, this O2O community is used to collect datasets. Three datasets from different periods have been collected, one for main analysis and the others for robustness testing. Unlike subjective survey questionnaire data, these data are practical and objective, directly exported from the online community backend.

One of reviewers questioned the representativeness of our samples. How should we respond to this question?