方法：运用危险因素指数，对2 0 3 1例外科手术病人进行评价和监测。

Methods: 2 031 operated patients were assessed and monitored by adopting the risk factor exponent.

youdao

方法：运用危险因素指数，对2 0 3 1例外科手术病人进行评价和监测。

Methods: 2 031 operated patients were assessed and monitored by adopting the risk factor exponent.

youdao