At present, the related content in manuscript has been revised to: “The SIR values based on the measured tracer element concentrations of food, feces, urine, soil and dust are presented in Table 1 and Figure 1.
Heavy metal elements accumulate in the 36 human body and interfere with the human endocrine system [5], damage the body's car- 37 diovascular and nervous systems [6.7], and can even lead to cancer [8].