As far back as I can remember, I have often come close to serious injury or death. When I was six year old, I narrowly escaped death for the first time. I was then ill with some minor respiratory ailment for which the simplest cure was sulfa.The doctor, having no knowledge that I was allergic to the drug, prescribed sulfa tablets. Shortly after giving me a pill, my mother returned from work to find me gasping for breath. She called the doctor who hurried back to my home.He saved my life by administering oxygen. Not long after that incident, I swallowed a chicken bone which became lodged in my throat. I was rushed to the hospital emergency ward in time to save my life. When I was eleven, I was bitten by a dog. As I look back, I recalled that the wound was not as painful as the series of shots which followed. Now, having all these narrow escapes behind me, I consider myself fortunate to be alive today. The organizational pattern of this passage is ______.