定义必须设置的填充，并将允许的状态列为一个数组。

之后，将人口纳入orderby 并对其进行排序DESC.

$q = new WP_Query( array(
    \'meta_query\' => array(
        \'relation\' => \'AND\',
        \'state_clause\' => array(
            \'key\' => \'state\',
            \'value\' => array( \'Wisconsin\', \'California\' ), //allowed values
            \'compare\' => \'IN\' // state must be in array above
        ),
        \'population_clause\' => array(
            \'key\' => \'population\',
            \'compare\' => \'EXISTS\',
        ), 
    ),
    \'orderby\' => array(
        \'population_clause\' => \'DESC\',
    ),
) );

$q = new WP_Query( array(
    \'meta_query\' => array(
        \'relation\' => \'OR\',
        \'state_clause\' => array(
            \'key\' => \'state\',
            \'value\' => array( \'Wisconsin\' ), //allowed values
            \'compare\' => \'IN\' // state must be in array above
        ),
        \'state_clause\' => array(
            \'key\' => \'timezone\',
            \'value\' => \'central,
            \'compare\' => \'=\'
        ),
        \'population_clause\' => array(
            \'key\' => \'population\',
            \'compare\' => \'EXISTS\',
        ), 
    ),
    \'orderby\' => array(
        \'population_clause\' => \'DESC\',
    ),
) );