A Special Appointment Years ago I moved to Woodland Hills to take a job in a small hospital's emergency department.No one wanted to work on Christmas Eve, so the shift   went to me.I kissed my family goodbye and went off to spend the night in the hospital.It was a thankless job. At 9 pm, the ambulance brought in a man in his 60s who was having a heart attack.His face was pale, and he was frightened. The whole night I did my best to save his life.Before I left in the morning to spend Christmas with my family, I stopped by to see how he was doing.It was still tough, but he had survived the night and was sleeping. The following year I got Christmas Eve duty again.At 9 pm sharp, the ward clerk told me there was a couple who wanted to speak with me.When I approached them, the man introduced himself as Mr.Lee and said, "You probably don't remember me, but last Christmas Eve you saved my life.Thank you for the year you gave me." He and his wife hugged me, handed me a small gift, and left. The following year a new doctor had joined the group, but I wanted to see if Mr.and Mrs.Lee would return.This time, I volunteered for the shift.I kept an eye on the door.Once again, at exactly 9 pm, the Lees appeared, carrying a warmly wrapped bundle.It was their new grandchild. Mr.Lee, his family and I spent 13 Christmas Eves together.In the later years the staff all knew about the story and would work to give me time with him in the break room, where we spent a half-hour each Christmas Eve. The last year I saw him, he brought me a gift.I carefully opened the package and found a crystal   bell inside.It was engraved   with a single word: Friendship.Now, my family, friends and I ring that bell every Christmas Eve at exactly 9 pm and offer our best wishes to the man who we won't forget. According to the passage, the author formed a habit of   _  .
celebrating Christmas Eve with her family giving Christmas gifts to the hospital staff spending Christmas Eve with Mr.Lee in hospital ringing the bell for patients in the emergency department