Bootstrap table使用心得---thead与td无法对齐的问题

//this.resetHeader();
//padding += this.$header.outerHeight();

        <thead>
            <tr>
                <th data-field="Code" data-width="105px">编号</th>
                <th data-field="Name" data-switchable="false">姓名</th>
                <th data-field="Sex" data-width="120px">性别</th>
                <th data-field="Age" data-width="120px">年龄</th>
                <th data-field="LoloOperate" data-width="30px">操作</th>
            </tr>
        </thead>