A <p><span style="color: rgb(51, 51, 51); font-family: "PT Sans", sans-serif; text-align: justify; background-color: rgb(255, 255, 255);">安全第一,预防为主</span></p> B <p><span style="color: rgb(51, 51, 51); font-family: "PT Sans", sans-serif; text-align: justify; background-color: rgb(255, 255, 255);">防消结合,综合治理</span></p> C <p><span style="color: rgb(51, 51, 51); font-family: "PT Sans", sans-serif; text-align: justify; background-color: rgb(255, 255, 255);">预防为主,综合治理</span></p> D <p><span style="color: rgb(51, 51, 51); font-family: "PT Sans", sans-serif; text-align: justify; background-color: rgb(255, 255, 255);">预防为主,防消结合</span></p>