Method : put these things into - boiling water for 15 - 20 minutes to ensure complete eradication of the infective agents . - used tissue paper should be properly disposed of into litterbin or flushed down the toilet . - keep the hands clean , not to rub the eyes with fingers , and not to share eyedrops or cosmetics with others 应将患者使用过的毛巾洗面用具及接触过患者眼部分泌物的物件消毒，方法是把这些用品放入自己的锑盆内，加入清水把用品盖过，然后放在炉上煲至水滚，持续15 - 20分钟，这样才可把细菌消灭，以免蔓延。
This work is to a certain extent guided by the idea of the concerto . due to the limitations of the small - sized harmonica and the problem of co - ordination between five chamber musicians instead of with one soloist , it is certainly more difficult than writing an organ concerto . moreover , there is no such practical orchestral experience in terms of performance before the premiere of this work 协奏曲的概念在一定程度上主导著这作品，一把细小口琴的限制与及五人聚合协调的难度，委实较写一首风琴协奏曲要有更多顾虑，实际演出的经验在这作品首演前更是零。
