小程序中预览文件时在手机端打开是正常的，PC端打开就显示不全，并不所有文件都这样，相同的文件格式下部分文件会出现这种情况

图1是电脑端预览打开的效果，只显示出了一页

图2是手机端效果，整个文件的内容都能正常显示

文件：https://file.51xinyoushi.cn/teaching_resource/1/G4OAEbyp-2A Unit 1 单元教学设计.docx

            wx.downloadFile({
                url: file.fileUrl,
                filePath: wx.env.USER_DATA_PATH + '/' + file.fileName,
                success: (res) => {
                    wx.hideLoading();
                    if (res.statusCode === 200) {
                        wx.openDocument({
                            filePath: res.filePath,
                            showMenu: true,
                            success: () => {
                                console.log('打开文档成功');
                            },
                            fail: (err) => {
                                console.error('打开文档失败:', err);
                                wx.showToast({
                                    title: '无法打开此文件',
                                    icon: 'none'
                                });
                            }
                        });
                    } else {
                        wx.showToast({
                            title: '文件下载失败',
                            icon: 'none'
                        });
                    }
                },
                fail: (err) => {
                    wx.hideLoading();
                    console.error('下载文件失败:', err);
                    wx.showToast({
                        title: '下载失败，请重试',
                        icon: 'none'
                    });
                }
            });