【推荐2】I know what courage looks like. I saw it on a flight I took six years ago, and only now can I speak of it without tears filling my eyes at the memory.

Our flight left the Orlando Airport one Friday morning. But immediately upon the take-off, it was clear that something was wrong. The aircraft was bumping (颠簸) up and down. All the experienced travellers, including me, looked around with knowing (会意的) smiles. If you fly much, you see these things and learn to act calmly about them. However, we did not remain calm for long.

Minutes after we were in the air, our plane began falling quickly. The pilot soon made a serious announcement. “We are having some difficulties,” he said. “Our indicators show that the control system has failed. We will be returning to the Orlando Airport. The flight attendants will prepare you for a bumpy landing. Also, if you look out of the windows, you will see that we are dumping (倾倒) fuel from the airplane. We want to have as little on board as possible in the event of a rough touchdown.” In other words, we were about to crash. Many travellers looked visibly frightened now. No one faces death without fear, I thought.

Then a couple of rows to my left, I heard a still calm voice, a woman’s voice, speaking in an absolutely normal conversational tone. I had to find the source of this voice. All around, people cried. Many screamed. Finally, I saw her. In this state of complete confusion and lack of order, a mother was talking to her child. The woman, in her mid-30s, was staring full into the face of her daughter, who looked to be four years old. The child listened closely, sensing the importance of her mother’s words. The mother’s eye held the child so fixed that she seemed untouched by the sounds of grief and fear around her.

Finally, I leaned over and could hear this soft sure voice with the tone of comfort. Over and over again, the mother said, “I love you so much. Remember, no matter what happens, I love you always.” Fortunately, our landing gear (起落架) held at last and our touchdown was not a tragedy.

However, the voice I heard that day never faded. That mom showed me what a real hero looks like.

【推荐3】I was working the overnight shift in a remote hospital in the Rocky Mountains. Late in the evening, a young African teenager was brought into the emergency department. He lived at sea level and had never been in the mountains. After skiing all day, he felt really ill. Everyone assumed it was altitude sickness.

He was sweating and had abdominal (腹部的) pain. His heart rate increased. We sent off his lab work, and his blood sugar came back at almost 600 — normal is less than 100. His platelets (血小板), necessary for stopping bleeding, came in at 10,000; they should have been over 150,000. I did an ultrasound of his abdomen, and it looked like his belly was full of blood. This wasn't altitude sickness. And in the short time I'd been trying to figure out what was wrong, he was getting sicker. The friends he was traveling with were terrified, and rightly so.

The mystery was finally solved with an old-fashioned microscope. When we looked at his blood, we saw some sickled (镰形的) red blood cells. That's how we were able to diagnose sickle cell trait. If you have sickle cell trait — which means you got the sickle cell gene from just one parent instead of two — you have no symptoms at low altitude, but high altitude can sometimes cause the red blood cells to turn into sickle shapes and take oxygen from vital organs. This teenager didn't know he had it, but the effect of the altitude on his blood cells was so extreme that after just a short time in the mountains, he suffered great pain.

He needed platelets immediately, but we didn't have enough at the remote hospital. And there was a snowstorm, so the medical helicopters couldn't fly. It was a scary night. Just as we were abandoning all hope, we met an ambulance that drove halfway up from the city with blood products and transferred him to the city hospital for emergency surgery. The story has a happy ending: He recovered fully.