Widget _buildDRate(BuildContext context) {
    return Column(children: const [
      TDCell(title: '顶部显示', noteWidget: TDRate(placement: PlacementEnum.top)),
      SizedBox(height: 16),
      TDCell(title: '不显示', noteWidget: TDRate(placement: PlacementEnum.none)),
      SizedBox(height: 16),
      TDCell(title: '底部显示', noteWidget: TDRate(placement: PlacementEnum.bottom)),
    ]);
  }