Thanks for your advice, and this explanation has been removed from the manuscript, it is changed to “this method analyzes the concentration of tracer elements in the soil to which children are exposed, the children's intake of food, their excreted feces and urine, and the content of the tracer element in the children’s food, feces, and urine.”
Page 2, lines 76-78: You can remove this sentence: a class of elements in the human body that are not easily absorbed by the human gastrointestinal tract and are also difficult to be transformed into other substances it’s not necessary Answer: