i caculate the D/ E ratio of Black Stone Minerals and find out that its really low. such as the average D/E ratio in 2017-2019 of it is 0.33. The average D/E ratio for U.S. firms is around 1.5. Could you tell me why there is a difference i noticed that the D/E ratio oil and gas industry is generally lowmaybe its the first reasonIs it abouttax shield or something else Could you help me to figure it out