急性上呼吸道感染的防治措施是()

A．休息是基本的治疗措施

B．饮食宜清淡、易消化富含营养

C．原则上不用抗生素

D．退热药首选对乙酰氨基酚

E．预防上呼吸道感染的关键是增强机体的抗病能力

"This company will not be training any more pilots in the foreseeable future, since we have 400 trained pilots on our waiting list who are seeking employment. The other five major companies each have roughly the same number of trained pilots on their waiting lists, and since the projected requirement of each company is for not many more than 100 additional pilots, there will be no shortage of personnel despite the current upswing in the aviation industry. "
Which one of the following, if true, casts the most doubt on the accuracy of the above conclusion

A．Most of the trained pilots who are on a waiting list for a job are on the waiting lists of all the major companies.

B．In the long run, pilot training will become necessary to compensate for ordinary attrition.

C．If no new pilots are trained, there will be an age imbalance in the pilot work force.

D．The quoted personnel projections take account of the current upswing in the aviation industry.

E．(E) Some of the other major companies are still training pilots but with no presumption of subsequent employment.