根据短文内容，从下面方框中选择适当的单词或短语填空，使短文内容完整正确。

know          climate          stay off           took part        grown into

The lights in many buildings around the world were turned off at 8: 30 p.m. on March 29^th, 2014. The lights _____小题1:____ for one hour an event called Earth Hour. The event is organized by the World Wide Fund for Nature, also ____小题2:___ as the World Wildlife Fund. People are asked to turn off their lights for one hour to call attention to ___小题3:_ an international event. People in more than seven thousand cities in one hundred and fifty countries ___小题4:__ this year. The event organizers say big changes start with small steps like turning out the lights.

男性，68岁，咳嗽气喘40年，5年来间断加重，伴下肢水肿，1周来咳喘并下肢水肿加重，痰白色、量多，伴有嗜睡而来院就诊。

以下化验检查对诊断具有重要意义的是（）

A.双肺MRI检查

B.心电图

C.脑电图

D.血气分析

E.痰培养