李广海同志:您好。感谢您对本刊的关爱与支持。收到来信,我们即对原稿与刊文进行了认真地检查与核对,发现原是我们在工作中校对不细、把关不严所造成差误。在此,我们编缉部仅向您以及广大读者致以真诚的歉意。人所共知,“丁”“块”原本予示着大小,即小者为“丁”,大者为“块” Comrade Li Guanghai: Hello. Thank you for your love and support. Upon receipt of the letter, we did a careful examination and verification of the original and the journal, and found out that we were mistaken in our work of proofing and failing to properly handle the matter. Here, our editorial department only sincerely apologizes to you and the readers. It is well known that “Ding” “Block” was originally intended to show the size, that is, the smaller one is “Ding” and the bigger one is “Block”