根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。（共5小题，满分10分）
Ten ways to Avoid the Flu
l Get a flu shot, particularly if you are 50 or over． In addition, consider a flu shot if you are in regular contact with many people, especially if you live in a dormitory or work in an open-plan office, where hundreds of people are coughing and sneezing in a common area．
l _ One recent study found that families whose children in daycare were immunized had 42% fewer infections with fever than those whose children weren’t immunized．
l Wash your hands frequently and thoroughly． A quick washing won’t do the trick． _
l Keep your hands away from your face to reduce the chance of delivering viruses directly to your eyes or nose． _
l Make certain you’re getting vitamin E and other complex vitamins and minerals including A, C and     B． These have properties（特性）that improve immune response． _
l Don’t smoke． Smoke stops the hair like cells in the nose and airways from sweeping incoming viruses away before they can infect people．
l Use paper handkerchiefs, not cloth handkerchiefs to reduce spread of infection．
l Reduce stress． Research has shown that immune responses are weakened by stress．
l Get seven to nine hours of sleep a night． Lack of sleep can reduce your immune response．
l _ Longtime heavy drinkers suffer from more colds and flu than others do, and even regular moderate use of alcohol can weaken immune response．

A．Children who are in a large family are easy to get flu．

B．To kill germs, experts recommend washing with soap for 15 to 30 seconds．

C．One study found that people typically touched their face fifteen times in an hour．

D．Many people are used to touching their faces when the flu is spreading．

E. Discuss with your doctor whether to immunize（使免疫）your children in daycare．;
F. Studies on older mice have shown that those with reduced levels of vitamin E were more likely to be infected．
Reduce alcohol consumption（消费量）．