如何在tizen原生应用中设置label小部件的字体/大小

#include <Elementary.h>

int main(int argc, char *argv[]) {
   // 初始化Tizen应用程序
   elm_init(argc, argv);

   // 创建一个窗口
   Evas_Object *win = elm_win_util_standard_add("Label Example", "Label Example");
   elm_win_autodel_set(win, EINA_TRUE);

   // 创建一个垂直布局容器
   Evas_Object *box = elm_box_add(win);
   evas_object_size_hint_weight_set(box, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
   elm_win_resize_object_add(win, box);
   evas_object_show(box);

   // 创建一个label小部件
   Evas_Object *label = elm_label_add(win);
   elm_object_text_set(label, "Hello, Tizen!");
   elm_object_text_font_set(label, "Sans", 20);
   elm_box_pack_end(box, label);
   evas_object_show(label);

   // 显示窗口并开始主循环
   evas_object_show(win);
   elm_run();

   // 清理资源
   elm_shutdown();

   return 0;
}