请为以下代码的每一句写上注释。Sub CopySameDay() Dim ws As Worksheet Dim lastRow As Long Dim i As Long Dim copyRange As Range Dim pasteRange As Range Dim wb As Workbook Dim folderPath As String Dim fileName As String Dim sumRange As Range Dim sumValue As Double Set ws = ActiveSheet lastRow = ws.Cells(Rows.Count, "D").End(xlUp).Row For i = 2 To lastRow If Format(ws.Range("D" & i).Value, "yyyy-mm-dd") = Format(ws.Range("D" & i - 1).Value, "yyyy-mm-dd") And ws.Range("B" & i).Value = ws.Range("B" & i - 1).Value Then If copyRange Is Nothing Then Set copyRange = ws.Range("A" & i - 1) End If Set pasteRange = ws.Range("A" & i) Else If Not copyRange Is Nothing Then folderPath = Left(ThisWorkbook.FullName, InStrRev(ThisWorkbook.FullName, "\")) fileName = pasteRange.Offset(0, 1).Value & ".xlsx" If Dir(folderPath & fileName) = "" Then Set wb = Workbooks.Add wb.SaveAs folderPath & fileName Else Set wb = Workbooks.Open(folderPath & fileName) End If wb.Sheets.Add(After:=wb.Sheets(wb.Sheets.Count)).Name = Format(copyRange.Offset(0, 3).Value, "yyyy-mm-dd") Set sumRange = wb.Sheets(wb.Sheets.Count).Range("K2:K" & (i - copyRange.Row + 2)) sumValue = Application.WorksheetFunction.Sum(sumRange) wb.Sheets(wb.Sheets.Count).Range("K2:K" & (i - copyRange.Row + 2)).NumberFormat = "0.00" copyRange.Resize(i - copyRange.Row, ws.Columns.Count).Copy wb.Sheets(wb.Sheets.Count).Range("A2") wb.Sheets(wb.Sheets.Count).Range("K" & (i - copyRange.Row + 2)).Value = sumValue ws.Rows(1).Copy wb.Sheets(wb.Sheets.Count).Range("A1") wb.Save wb.Close Set copyRange = Nothing End If End If Next i If Not copyRange Is Nothing Then folderPath = Left(ThisWorkbook.FullName, InStrRev(ThisWorkbook.FullName, "\")) fileName = pasteRange.Offset(0, 1).Value & ".xlsx" If Dir(folderPath & fileName) = "" Then Set wb = Workbooks.Add wb.SaveAs folderPath & fileName Else Set wb = Workbooks.Open(folderPath & fileName) End If wb.Sheets.Add(After:=wb.Sheets(wb.Sheets.Count)).Name = Format(copyRange.Offset(0, 3).Value, "yyyy-mm-dd") Set sumRange = wb.Sheets(wb.Sheets.Count).Range("K2:K" & (lastRow - copyRange.Row + 3)) sumValue = Application.WorksheetFunction.Sum(sumRange) wb.Sheets(wb.Sheets.Count).Range("K2:K" & (lastRow - copyRange.Row + 3)).NumberFormat = "0.00" copyRange.Resize(lastRow - copyRange.Row + 1, ws.Columns.Count).Copy wb.Sheets(wb.Sheets.Count).Range("A2") wb.Sheets(wb.Sheets.Count).Range("K" & (lastRow - copyRange.Row + 3)).Value = sumValue ws.Rows(1).Copy wb.Sheets(wb.Sheets.Count).Range("A1") wb.Save wb.Close End If End Sub

注释如下：

Sub CopySameDay()

' 定义变量
Dim ws As Worksheet ' 工作表
Dim lastRow As Long ' 最后一行
Dim i As Long ' 循环计数变量
Dim copyRange As Range ' 复制区域
Dim pasteRange As Range ' 粘贴区域
Dim wb As Workbook ' 工作簿
Dim folderPath As String ' 文件夹路径
Dim fileName As String ' 文件名
Dim sumRange As Range ' 求和区域
Dim sumValue As Double ' 求和结果

' 获取当前活动工作表
Set ws = ActiveSheet

' 获取最后一行
lastRow = ws.Cells(Rows.Count, "D").End(xlUp).Row

' 循环遍历行
For i = 2 To lastRow
    ' 判断是否为同一天且同一人
    If Format(ws.Range("D" & i).Value, "yyyy-mm-dd") = Format(ws.Range("D" & i - 1).Value, "yyyy-mm-dd") And ws.Range("B" & i).Value = ws.Range("B" & i - 1).Value Then
        ' 如果是，设置复制区域和粘贴区域
        If copyRange Is Nothing Then
            Set copyRange = ws.Range("A" & i - 1)
        End If
        Set pasteRange = ws.Range("A" & i)
    Else
        ' 如果不是，进行复制和粘贴操作
        If Not copyRange Is Nothing Then
            ' 获取文件夹路径和文件名
            folderPath = Left(ThisWorkbook.FullName, InStrRev(ThisWorkbook.FullName, "\"))
            fileName = pasteRange.Offset(0, 1).Value & ".xlsx"
            ' 判断文件是否存在，不存在则新建，存在则打开
            If Dir(folderPath & fileName) = "" Then
                Set wb = Workbooks.Add
                wb.SaveAs folderPath & fileName
            Else
                Set wb = Workbooks.Open(folderPath & fileName)
            End If
            ' 在工作簿中添加新的工作表
            wb.Sheets.Add(After:=wb.Sheets(wb.Sheets.Count)).Name = Format(copyRange.Offset(0, 3).Value, "yyyy-mm-dd")
            ' 获取求和区域和求和结果
            Set sumRange = wb.Sheets(wb.Sheets.Count).Range("K2:K" & (i - copyRange.Row + 2))
            sumValue = Application.WorksheetFunction.Sum(sumRange)
            ' 设置求和区域的数字格式
            wb.Sheets(wb.Sheets.Count).Range("K2:K" & (i - copyRange.Row + 2)).NumberFormat = "0.00"
            ' 复制数据到新的工作表中
            copyRange.Resize(i - copyRange.Row, ws.Columns.Count).Copy wb.Sheets(wb.Sheets.Count).Range("A2")
            ' 将求和结果写入新的工作表中
            wb.Sheets(wb.Sheets.Count).Range("K" & (i - copyRange.Row + 2)).Value = sumValue
            ' 将表头复制到新的工作表中
            ws.Rows(1).Copy wb.Sheets(wb.Sheets.Count).Range("A1")
            ' 保存工作簿并关闭
            wb.Save
            wb.Close
            ' 清空复制区域
            Set copyRange = Nothing
        End If
    End If
Next i

' 如果仍有复制区域，进行最后一次复制和粘贴操作
If Not copyRange Is Nothing Then
    ' 获取文件夹路径和文件名
    folderPath = Left(ThisWorkbook.FullName, InStrRev(ThisWorkbook.FullName, "\"))
    fileName = pasteRange.Offset(0, 1).Value & ".xlsx"
    ' 判断文件是否存在，不存在则新建，存在则打开
    If Dir(folderPath & fileName) = "" Then
        Set wb = Workbooks.Add
        wb.SaveAs folderPath & fileName
    Else
        Set wb = Workbooks.Open(folderPath & fileName)
    End If
    ' 在工作簿中添加新的工作表
    wb.Sheets.Add(After:=wb.Sheets(wb.Sheets.Count)).Name = Format(copyRange.Offset(0, 3).Value, "yyyy-mm-dd")
    ' 获取求和区域和求和结果
    Set sumRange = wb.Sheets(wb.Sheets.Count).Range("K2:K" & (lastRow - copyRange.Row + 3))
    sumValue = Application.WorksheetFunction.Sum(sumRange)
    ' 设置求和区域的数字格式
    wb.Sheets(wb.Sheets.Count).Range("K2:K" & (lastRow - copyRange.Row + 3)).NumberFormat = "0.00"
    ' 复制数据到新的工作表中
    copyRange.Resize(lastRow - copyRange.Row + 1, ws.Columns.Count).Copy wb.Sheets(wb.Sheets.Count).Range("A2")
    ' 将求和结果写入新的工作表中
    wb.Sheets(wb.Sheets.Count).Range("K" & (lastRow - copyRange.Row + 3)).Value = sumValue
    ' 将表头复制到新的工作表中
    ws.Rows(1).Copy wb.Sheets(wb.Sheets.Count).Range("A1")
    ' 保存工作簿并关闭
    wb.Save
    wb.Close
End If

End Sub