search 属性由 URL 的整个 "请求参数" 部分组成，包括前导 ASCII 问号 (?) 字符。
¥The search property consists of the entire "query string" portion of the
URL, including the leading ASCII question mark (?) character.
例如：'?query=string'。
¥For example: '?query=string'.
不执行查询字符串的解码。
¥No decoding of the query string is performed.