预防结膜囊缩窄的有效方法是（）
A.行眼球摘除术时，应减少组织损伤，防止术后瘢痕收缩，而且术中应尽量多保留球结膜
B.防止损伤外眦韧带，以避免下睑松弛下垂
C.眼部遭受外伤、热烧伤、化学伤后，在挽救视力的同时，早期应注意采取各种措施以预防和尽量减轻睑球粘连和结膜囊缩窄
D.佩戴义眼日久后，若发现义眼不合适，应及时寻找原因进行处理，必要时应重配义眼
E.儿童眼球摘除后应在青春期过后进行配戴义眼，以免影响发育
参考答案：A, B, C, D
A first-grade student named Vincent Butterfield has a best friend who gets cancer. He thought that hours of playing and jokes was not enough - he wanted to show how he understood the hard time he was going through. Five-year-old Vincent decided the only way was to shave(剃光)his head to support his best friend Zac Gossage who lost his through chemotherapy(化疗). When the little boy___ why he shaved his hair off, he answered, "To make Zac feel like he's not the only one_____any hair." Vincent has also been learning about cancer and raising money his best friend after learning how his treatments are. He made over 20 and sold them, raising more than $200 to give to Zac. The little boy's mom Karen Butterfield said, "We have been making more scarves and it would be cool if we could sell them ，” When people asked him friendship was like, Vincent looked at his friend Zac and replied, "It's a beautiful thing. Friends always each other."
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