问多个查询- Route.get()需要回调函数，但得到了一个[未定义的对象]

EN

function selectStmt(stmt) {
    return function (req, res, cb) {
        pg.connect(conString, function (err, client, next) {
            if (err) {
                console.log(err);
            } else {
                client.query(stmt, function (err, result) {
                    if (err) {
                        console.log(err);
                    } else {
                        req.package = JSON.parse(JSON.stringify(result.rows));
                        console.log(req);
                        cb(req.package);
                        next();
                    }
                });
            }
        });
    }
}

var getDataX = selectStmt('select x from tblX');
var getDataY = selectStmt('select y from tblY');

router.get('/', getDataX(), getDataY(), function(req, res, next) {
    res.render('dbtestasync', {dataPackage1: req.package, dataPackage2: req.package});
});

module.exports = router;