tblExchangeRate如下图：

通过下面的函数即可为表中每个货币获取到对美元的汇率(如果存在)：

Public Function GetUSDRate()
    On Error Resume Next
    Dim HTML As Object
    Dim URL As String
    Dim rst As DAO.Recordset
      
    Set rst = CurrentDb.OpenRecordset("tblExchangeRate")
    Set HTML = CreateObject("htmlfile")
    With CreateObject("msxml2.xmlhttp")
        Do Until rst.EOF
            rst.Edit
            URL = "http://www.zhaotool.com/v1/api/huobi/e10adc3949ba59abbe56e057f20f883e/" & rst!tocurrency & "/USD"
            .Open "get", URL, False
            .send
            HTML.BODY.innerhtml = StrConv(.responsebody, vbUnicode)
            If Mid(HTML.BODY.innerhtml, 10, 1) = "0" Then
                rst![Rate] = Int(Mid(Split(HTML.BODY.innerText, "rate")(1), 4, Len(Split(HTML.BODY.innerText, "rate")(1)) - 6) * 10) / 10
                rst.Update
            End If
            rst.MoveNext
        Loop
        rst.Close
    End With
    Set HTML = Nothing
End Function