二者都是动词，treat意为“治疗”，强调用药物或医疗手段医治的过程，并不表示治疗了效果。heal意为“治愈”，指医好伤病。如：
① The dentist is treating his teeth.牙医在为他治牙。
② The doctor healed my burns. 医生治好了我的烧伤。
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