loyaltrojan

I understand that for Naturalization there are 2 main requirements: 1- 5 years continuous presence 2- Out of the 5 years, 2.5 years physical residence in US must be maintained In #1, what does continuous presence mean? I got my LPR in March 2016 and took a 4 month sabbatical and returned to the US. Will this make me ineligible to apply for Naturalization in March 2021? In #2, what does physical residence in the US for 2.5 years mean? Will I become ineligible in March 2021 if I go on a 3 or 4 week vacation in the last 2.5 years of the 5 years? Thanks!