患儿,2岁。体重7kg,腹大如鼓,青筋暴露,四肢大肉尽脱,杳不思食,精神萎靡,疲乏无力,舌质淡嫩,苔薄少,指纹淡。其病机是
患儿,2岁。体重7kg,腹大如鼓,青筋暴露,四肢大肉尽脱,杳不思食,精神萎靡,疲乏无力,舌质淡嫩,苔薄少,指纹淡。其病机是
A student finds it difficult to learn the English sounds [θ] and[ð].If you are the teacher, which of the following strategies can be used?