Many patients and friends have planned for the doctor to schedule the surgery before they are admitted, and how to arrange the post-operative time …… Generally speaking, the hospital stay is short and the recovery is fast after surgery in our department, but there are many special cases, such as severe anemia, other colorectal lesions found before surgery, the complexity of the disease itself, and so on, which require clinical doctors to do a good job of preoperative examination and detailed preoperative evaluation, and require patients’ friends to have sufficient patience to cooperate with us in order to meet our expectations of prognosis to the greatest extent.