Please make up an early warning formula for communication letters. Idea: short-term, medium-term, medium-term and long-term were not equal to 1 yesterday, but they are all equal to 1 today.

short term: = 1 * (c-LLV (l, 5))/(HHV (c, 5)-LLV (l, 5));

metaphase: = 1 * (c-LLV (l, 1))/(HHV (c, 1)-LLV (l, 1));

medium and long term: = 1 * (c-LLV (l, 2))/(HHV (c, 2)-LLV (l, 2));

long term: = 1 * (c-LLV (l, 3))/(HHV (c, 3)-LLV (l, 3));

XG:REF (short term, 1) <; 1? AND? REF (mid-term, 1) < 1? AND? REF (medium and long term, 1) < 1? AND? REF (long-term, 1) < 1? AND? Short-term =1

AND? Medium term =1? AND? Medium and long term =1? AND? Long term =1;