默认情况下，<TableContainer />和<Table />组件的宽度都设置为100%。如果您希望margin为任意一种，请将该元素的宽度设置为auto。

<TableContainer sx={{ mr: '100px', width: 'auto' }}>
  <Table aria-label="customized table">
    <TableHead>
      <TableRow>
        <StyledTableCell
          sx={{
            fontSize: 20,
            borderBottom: '1px solid #d9d9d6',
            borderTop: '1px solid #d9d9d6',
            borderLeft: '1px solid #d9d9d6',
            borderRight: '1px solid #d9d9d6',
          }}
        >
          RPC Name Response
        </StyledTableCell>
      </TableRow>
    </TableHead>
    <TableBody>
      <TableRow>
        <TableCell
          sx={{
            borderBottom: '1px solid #d9d9d6',
            borderLeft: '1px solid #d9d9d6',
            borderRight: '1px solid #d9d9d6',
          }}
          className="response-container"
        >
          <div className="response">{response}</div>
        </TableCell>
      </TableRow>
    </TableBody>
  </Table>
</TableContainer>