供应大脑的正常血液量被切断后，人就会晕厥而不省人事，当人们被听到或看到所震惊时，就可能发生晕厥现象，针对不同的晕厥情况要采取不同的急救措施。

People faint when the normal blood supply to the brain is suddenly cut down. This can happen if they are surprised or shocked by sudden news or by something they see. Some people faint if they see others hurt. Some people faint in crowds. Others faint if they are in a room that is hot and stuffy.

If a person faints while standing, lay him down. If his face is pale, lift his feet. If he is sitting down when he faints, place his head between his knees. Loosen any tight clothing that might keep him from breathing easily. If possible, place a cold, wet cloth on his forehead.

We try to help a person who has fainted by _________.

A. tightening his muscles

B. rubbing his head

C. returning blood to his brain

D. holding him in an upright position

阅读理解

供应大脑的正常血液量被切断后，人就会晕厥而不省人事，当人们被听到或看到所震惊时，就可能发生晕厥现象，针对不同的晕厥情况要采取不同的急救措施。

People faint when the normal blood supply to the brain is suddenly cut down. This can happen if they are surprised or shocked by sudden news or by something they see. Some people faint if they see others hurt. Some people faint in crowds. Others faint if they are in a room that is hot and stuffy.

If a person faints while standing, lay him down. If his face is pale, lift his feet. If he is sitting down when he faints, place his head between his knees. Loosen any tight clothing that might keep him from breathing easily. If possible, place a cold, wet cloth on his forehead.

We try to help a person who has fainted by _________.

A. tightening his muscles

B. rubbing his head

C. returning blood to his brain

D. holding him in an upright position