题目内容
（请给出正确答案）
[主观题]
After the use of the laser beam, surgeons can perform. operation whichA．leave their patien
After the use of the laser beam, surgeons can perform. operation which
A．leave their patients with negative effects
B．can treat only human eye diseases
C．do little damage to their patients
D．make their patients need a long time to recover
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