People who perceived greater social support were less likely to come down with a cold, and the researchers calculated that the stress-reducing effects of hugging explained about 32 percent of that beneficial effect.

2017年考研真题（英语一）完形填空 Section Ⅰ

Some experts attribute the stress-reducing, health-related benefits of hugging to the release of oxytocin, often called "the bonding hormone" because it promotes attachment in relationships, including that between mothers and their new-born babies.

2017年考研真题（英语一）完形填空 Section Ⅰ