【单选题】

Everyone knows hand washing is important.But a new study shows how washing yore" hands (67) , and at the right time, can have a big impact on your family’s risk of getting sick.

Most studies on hand washing focus on (68) and food service workers.But this month’sAmerican Journal of InfectionControl focuses on washing hands at (69) as a way to stop infections from (70) Several studies show hands are the single most important (71) route for all types of infections.
Even though most people know to wash their hands after using the toilet or handling a diaper (尿布), studies (72) many people are still ending up with germs on their hands.
One study looked in homes of (73) recently vaccinated against polio (脊髓灰质炎).After vaccination, the virus is (74) to be shed in the baby’s feces (粪便). Researchers found the virus on 13 percent of bathroom, living room and kitchen surfaces. (75) the virus from the vaccine didn’t pose a health risk, feces-borne viruses can (76) through the home.
Doorknobs and toilet flush handles are key (77) of germ transmission in the home. That’s why people should focus on cleaning such surfaces (78) and always wash their hands after touching them. In one study, a (79) touched a door handle contaminated with a virus. He then shook hands (80) other volunteers, and spread the virus to six people.
The study authors note that the timing of hand washing is key. It’s (81) to wash hands after using the toilet, before eating or handling fooD、Other crucial times for hand washing are after (82) a diaper or cleaning up after a pet, or after touching garbage cans, dish rags and utensils that may have come (83) contact with raw fooD、
While it may be hard to (84) that something as simple as regular hand washing can make a difference in your family’s health, consider what happened during the 2003 outbreak of SARS. The outbreak (85) extensive public and community health measures, including regular hand washing. Not only was the SARS outbreak contained, (86) other cases of illnesses dropped sharply.
A．claim
B．agree
C．suggest
D．object