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def greet(name):
    """返回打招呼的问候语。"""
    return f"Hello, {name}!"def greet(name):
    """返回打招呼的问候语。"""
    return f"Hello, {name}!"def greet(name):
    """返回打招呼的问候语。"""
    return f"Hello, {name}!"def greet(name):
    """返回打招呼的问候语。"""
    return f"Hello, {name}!"