Tympanostomy tubes are meant to ______.A．dissolve slowly.B．replace medicines.C．alleviate e

Tympanostomy tubes are meant to ______.

A．dissolve slowly.

B．replace medicines.

C．alleviate eardrum pressure.

D．reduce earaches.

正确答案：D
解析：进行tympanostomy手术的目的在第一段中：“American kids have drainage tubes surgically implanted in their ears to combat persistent infections"，最后一段中有“Once successfully implanted，the tiny devices provide drainage for six months to a year．．．”综上所述，该手术是为了给那些耳朵发炎的人植入导管，以便于排脓，这样可省下持续的医疗费用。从四个选项中，可以发现D最为接近，因为通常耳朵发炎会引起疼痛。