如何通过与map元素进行比较来创建新字符串？

def create_new_string(original_string, char_map):
    new_string = ""
    for char in original_string:
        if char in char_map:
            new_string += char_map[char]
        else:
            new_string += char
    return new_string

# 示例使用
original_string = "Hello World"
char_map = {
    "H": "X",
    "W": "Y",
    "d": "Z"
}
new_string = create_new_string(original_string, char_map)
print(new_string)  # 输出：Xello YorlZ