有关特发性肺纤维化的叙述正确的是（）。
A.起病隐匿
B.逐渐加重的劳力性呼吸困难
C.肺功能主要表现为限制性通气功能障碍
D.严重时发展为Ⅰ型呼吸衰竭
E.激素治疗效果好
参考答案：E
解析：特发性肺纤维化系指病因不明，局限于肺部的弥漫性肺间质纤维化，以隐袭性和进行性呼吸困难为突出症状，肺功能表现为进行性限制性通气功能障碍和弥散量减少，严重时发展为Ⅰ型呼吸衰竭，部分病人糖皮质激素治疗有效。
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| I live in a big city with a lot of homeless people. Luckily there're small ways of helping them and you needn't have a lot of__1__. One way to help is to buy their monthly magazine.__2__doing this one day, I got to__3__a young homeless man. He was often__4__the magazine at the train station. He was a poor farmer from another country. After a while, I discovered that his _5__was close to mine. It__6__that we were born in the same month. I met him last year__7__after his birthday, and after congratulating(祝贺) him, without__8__, I asked if he had had a good day. He__9__and said that he hadn't really celebrated. I felt so __10__. I just couldn't bear the thought of (不敢想) this nice, young man being__11__on his 25th birthday with no presents, no cake, nothing! So I went home and looked in my yarn(纱线) basket.__12__for me, I had enough yarn__13__. I set to work and knitted (编织) a__14__for the young man. The yarn had become a little dirty__15__I didn't knit very often. Then I washed the yarn so the scarf would be__16__ when he got it. I met him on my own birthday as I was going shopping. I had__17__to meet him so I had__18__the scarf and a piece of my own birthday__19__around with me. He was very happy with these gifts and so was I. The__20__in his eyes was the best present he could have given me! | |||
| ( )1．A.work ( )2．A.In ( )3．A.realize ( )4．A.selling ( )5．A.birthday ( )6．A.said ( )7．A.long ( )8．A.stopping ( )9．A.looked up ( )10．A.foolish ( )11．A.calm ( )12．A.Suddenly ( )13．A.used ( )14．A.scarf ( )15．A.when ( )16．A.different ( )17．A.liked ( )18．A.made ( )19．A.cake ( )20．A.light | B．energy B．On B．ignore B．reading B．house B．found B．shortly B．helping B．turned up B．excited B．happy B．Luckily B．done B．cap B．because B．dry B．hoped B．thrown B．present B．pain | C．money C．Besides C．know C．covering C．height C．guessed C．ever C．praising C．looked down C．clever C．alone C．Badly C．left C．sock C．so C．wet C．promised C．received C．song C．sight | D．experience D．By D．recognize D．buying D．hobby D．meant D．even D．thinking D．got down D．worried D．hungry D．However D．produced D．glove D．and D．clean D．agreed D．carried D．party D．tear |