物流轨迹跟踪系统中若需获取前3条记录，以下哪种方式最高效？（ ） conn = sqlite3.connect('logistics.db') cursor = conn.cursor() cursor.execute(''' SELECT track_id, location, timestamp FROM tracking WHERE package_id = ? ORDER BY timestamp DESC''', ('PKG12345',)) # 获取最新轨迹 latest_record = cursor.fetchone()
A：[cursor.fetchone() for _ in range(3)]
B：cursor.fetchmany(3)
C：cursor.fetchall()[:3]
D：循环调用fetchone()三次
正确答案：B
试卷来源：202506 青少年软件编程等级考试Python六级真题