?坚守

... keep away from (常与from连用)远离；不接触 keep to sth. 信守；坚持；坚守；不违背(诺言、计划等) keep ...from(doing)sth. 避开；禁止；克制 ...

?限制自己

... keep sth to oneself 不让他人分享 keep to sth 履行诺言，限制自己 keep to the beaten track 循规蹈矩 ...