4 . Have you ever been in a bathroom, dressing room or another private area with a mirror and had that feeling that someone is watching you? You can check to see if a mirror is transparent by observing how it is installed and using a few simple techniques to determine if there’s a wall behind it.     1    

Check out the lighting. For a two-way mirror to be effective, the light on the mirrored side needs to be 10 times brighter than the light on the other side. If the lighting is dimmer, it’s possible to see through the glass to the observation area. Look around and determine whether the lighting seems extraordinarily bright.     2    

    3    Press your face up to the mirror and cup your hands around it, creating a dark tunnel to block out as much light as possible. When you do this, if the light in the observation room is at all brighter than the light on your side of the mirror, you should be able to see something through the glass.

Sound it out. The sound of tapping a two-way mirror has also been described as bright or sharp as opposed to a thud (砰的一声) from an everyday mirror. Tap on the surface of the mirror with your knuckle (指节).     4    An observation mirror will produce an open, hollow and echoing sound because there is an open space on the other side.

    5    Then hold a flashlight to the mirror (it can be the “flashlight” on your smartphone). If it is a two-way mirror, the room on the other side will be illuminated and you’ll be able to see it.

5 . Natural disasters may claim thousands of lives or destroy millions of homes. What can we learn from disasters?

Sometimes, there are no real answers. Everyone has lost something and someone, and they keep on asking what they have done to deserve this cruel fate. It’s okay to hold on to these questions, but no matter how hard and painful it is, you should keep moving, breathing and living.     1    

Even strangers can teach you kindness. There may be millions of selfish people in the world.     2     There is still kindness out there, waiting to be discovered. You will find it everywhere, at the most unexpected places—even among the wastelands left by the disaster.

Family is everything. Sometimes we forget to love our family, just because we’re too busy with our own lives.     3     We will not realize their value until we arrive at an empty house, an abandoned and forgotten place that you once called “home”.

    4     Sure, reality can be harsh and unforgiving but it doesn’t mean that we should blame ourselves and feel like a victim forever. We have to strive and thrive; we have to fight and do whatever it takes to resist and rise up. Not everyone will have a happy ending or an interesting plot, but we can always decide how to write the ending.

Every day of your life should be spent loving and living. Don’t be angry at the world for letting you live an unbearable life of heartbreaks and frustrations.     5     So just love deep and love hard. Live as if it’s your only chance to find the happiness that you deserve.

6 . Americans spend billions on vitamins, multivitamins for their health, but a review of numerous studies concluded there is little to no evidence that some of those vitamins prevent heart disease, cancer or death.

The report, released by the U.S. Preventive Services Task Force last week, concluded that “recent evidence is not enough” to determine whether vitamins actually help or hurt your health, based on 84 studies, 52 of which were done since 2014. Vitamins examined included vitamins A, B, C, D and E, as well as other multivitamins.

“Our suggestion is neither for nor against taking vitamins, or combinations of those nutrients (营养物质). We just don’t have enough evidence,” said Dr. John Wong, a doctor in the Department of Medicine at Tufts Medical Center who was involved in the report.

While the finding is that vitamins don’t have any benefits to “healthy, non-pregnant (未怀孕) adults”, it doesn’t apply to “children, people who are pregnant or may become pregnant, or people who are hospitalized.”

The Task Force admitted it makes sense that people would take vitamins in hopes of health benefits, as some shortage may lead to illness. But experts agreed the best way to get good health and prevent cancer is a balanced diet and regular physical activity.

“The suggestion across all organizations about vitamins is to eat a balanced diet, and then the key tends to be on plenty of fruit and vegetables and less junk foods,” Wong said.

Wong added people should refer to their health doctors to determine if any vitamins are worth taking. He said this suggestion should also serve as a need to further research into proving the official benefits and risks for each vitamin.