If the acceptable values are numeric, use a bounded numeric entry control such as a slider, instead. If the list of acceptable values is composed of text strings, a list control should be used so users are not forced to type.

• 如果可接收的值是数值，应该使用如滑动块或调节器这样的有界输入控件；如果可接收值列表由文本行组成，应该使用列表控件，这样用户就不必打字了。