Like most people, I was brought up to look upon life as a getting. It was not until in my later thirties that I made this important discovery: giving-away makes life so much more exciting. One discovery I made about giving away is that it is almost impossible to give away anything in this world without getting something back, though the return often comes in an unexpected form. One Sunday morning the local post office delivered a letter to my home, though it was addressed to me at my office. I wrote the postmaster a note of appreciation. More than a year later I needed a post office box for4 a new business I was starting. I was told at the window that there were boxes left, and that my name would have to go on a long waiting list. As I was about to leave, the postmaster appeared in the doorway. He had overheard our conversation.“Wasn’t it you that wrote us a letter a year ago about delivering a special delivery to your home?”I said it was.“Well, you certainly are going to have a box in this post office if you have to make one for you. You don’t know what a letter like that means to us. We usually get nothing but complains.”
46. At first the author looked upon life as a process of getting. He formed this view of life because
.
A．other people were selfish B．he thought it exciting to get from others
C．of his early education D．of his character
47. The author wrote a note of appreciation to the post office because .
A．he knew what such a note would mean to the post office.
B．he had discovered giving-away made life all the more exciting
C．he believed he would get something back by doing so
D．the post man delivered an important letter in time
48. When the author needed a post-office box., .
A．many had applied for post-office box before him
B．he asked to put his name on a waiting list
C．he tried to see the postmaster
D．he wrote the postmaster a note of appreciation
49. The postmaster promised .
A．to make a new post-office box for the author
B．to let the author have a post-office box
C．to include the author’s name on the list
D．to deliver the author’s mail to his home
50. The postmaster interfered because .
A．he overheard this conversation
B．he had received a lot of complaints for lack of post-office box
C．he was thankful for the letter the author had written
D．he was proud of their good service.
唇侧龈缘如虫蚀状，覆有灰褐色假膜，可擦去，留下出血面。龈 * * 和边缘龈呈直线刀切状。无松动，无牙周袋。口腔内有特殊腐败臭味。颌下淋巴结肿大压痛。可能的诊断是（）。