朗读课文，体会作者的情感变化，再填空。    

作者感到失望是因为：______________________________________________________________________

感到愦憾是因为：__________________________________________________________________________

感到惊奇是因为：__________________________________________________________________________

感到心头怦然一震是因为：______________________________________________________________________________________________________________________________________________________________

黄水疮后期皮损干燥结痂，痂皮脱落，留下瘢痕。