题目内容：

A new study suggests that the timing of a wound affects the speed at which it heals（痊愈）. Wounds suffered during the day heal around 60 percent faster than those at night.

The study showed how the bodies circadian rhythm（昼夜节律）controlled the healing of

wounds. 1. It tells our bodies when to wake up, eat and sleep in a circle—a series of activities that repeat themselves day after day. 2.

In the study, researchers found that skin cells moved faster to repair wounds suffered during the day. Their findings were published in the journal Science Translational Medicine.

The researchers examined cells, mice, and burn injury databases. 3.

Night-time burns—burns suffered between 8 o’clock at night and 8 o’clock in the next morning—were 95 percent healed after an average of 28 days.

But after an average of 17 days, daytime burns -burns suffered between 8 o’clock in the morning and 8 at night -were 95 percent healed. 4.

Wounds are very costly to treat. 5. In Britain’s National Health Services, for example, such services cost around $6.56 billion per year. Experts say the high costs result, in part, from a lack of drugs that speed up the closure of wounds.

A. Each cycle lasts about 24 hours.

B. The circadian rhythm is like a clock or timer.

C. Specifically, their investigation found the following information:

D. The new study’s findings could help scientists develop better drugs.

E. In other words, nighttime injuries took an average of 11 days longer to heal.

F. Worldwide, billions of dollars are spent every year on wound-treatment services.

G. That’s what a group of researchers from a university in Canada recently published.