jiān / dū / zhě / fā / xiàn / wèn / tí / hòu / lì / jí / yāo / qiú / gōng / zuò / rén / yuán / tíng / zhǐ / cāo / zuò监督者发现问题后,立即要求工作人员停止操作。After finding a problem, the supervisor immediately told the staff to stop operating.