全文获取类型
收费全文 | 1676篇 |
免费 | 376篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 46篇 |
儿科学 | 35篇 |
妇产科学 | 164篇 |
基础医学 | 65篇 |
口腔科学 | 11篇 |
临床医学 | 1059篇 |
内科学 | 185篇 |
皮肤病学 | 13篇 |
神经病学 | 50篇 |
特种医学 | 59篇 |
外科学 | 73篇 |
综合类 | 30篇 |
预防医学 | 131篇 |
眼科学 | 4篇 |
药学 | 34篇 |
肿瘤学 | 99篇 |
出版年
2024年 | 6篇 |
2023年 | 58篇 |
2022年 | 6篇 |
2021年 | 26篇 |
2020年 | 29篇 |
2019年 | 11篇 |
2018年 | 84篇 |
2017年 | 102篇 |
2016年 | 100篇 |
2015年 | 100篇 |
2014年 | 93篇 |
2013年 | 100篇 |
2012年 | 47篇 |
2011年 | 66篇 |
2010年 | 68篇 |
2009年 | 89篇 |
2008年 | 52篇 |
2007年 | 56篇 |
2006年 | 58篇 |
2005年 | 45篇 |
2004年 | 38篇 |
2003年 | 33篇 |
2002年 | 26篇 |
2001年 | 43篇 |
2000年 | 30篇 |
1999年 | 54篇 |
1998年 | 45篇 |
1997年 | 69篇 |
1996年 | 55篇 |
1995年 | 55篇 |
1994年 | 43篇 |
1993年 | 33篇 |
1992年 | 36篇 |
1991年 | 34篇 |
1990年 | 40篇 |
1989年 | 35篇 |
1988年 | 19篇 |
1987年 | 20篇 |
1986年 | 16篇 |
1985年 | 13篇 |
1984年 | 13篇 |
1983年 | 9篇 |
1982年 | 16篇 |
1981年 | 15篇 |
1979年 | 13篇 |
1978年 | 7篇 |
1977年 | 7篇 |
1976年 | 15篇 |
1975年 | 9篇 |
1974年 | 5篇 |
排序方式: 共有2058条查询结果,搜索用时 31 毫秒
1.
2.
Fluid role boundaries: exploring the contribution of the advanced nurse practitioner to multi‐professional palliative care 下载免费PDF全文
3.
4.
MR compatibility of Guglielmi detachable coils 总被引:6,自引:0,他引:6
5.
BEVERLY HAVENS RN MN MPH INGRID SWENSON RN DPH 《Journal of obstetric, gynecologic, and neonatal nursing : JOGNN / NAACOG》1986,15(5):406-411
Seventy-four 8th- and 10th-grade students attending a private girls' school in Hawaii were queried about their perceptions of and preparation for menstruation using a questionnaire administered in a health education class. Eighty percent had already started menstruating. The most frequently cited perceptions by the respondents referred to both the inconveniences and the normalcy of menstruation. Many were first informed about menstruation by their mothers and stated that they also first informed their mothers when they started menstruating. Surprise, fear, and embarrassment were common initial reactions, while strong negative or positive emotions were more rare. Only 35% wanted boys and girls together during class discussion, but 89% stated that boys needed to be informed about menstruation. The most frequent reasons cited for noncoed settings were the girls' concern about their comfort in openly discussing menstruation. Thirty-eight percent thought parents should inform other siblings when they started menstruation, although almost half gave specific conditions the parents should consider. The majority thought the fifth to sixth grades were the best times to introduce menstruation content. 相似文献
6.
The Medical Research Council UKALL V trial for children with standard-risk acute lymphoblastic leukemia (ALL) (aged 1 to 14 years, leucocyte count less than 20 X 10(9)/L) was designed to determine whether the immunosuppressive effects of treatment could be reduced without sacrifice of antileukemic effect by alterations in the type of continuing therapy or in fractionation of cranial irradiation. Remission was achieved in 496 children on standard induction therapy, and 309 children received 24 Gy of cranial irradiation in ten to 16 fractions over 21 days, and 174 received 21 Gy in five to nine fractions over 21 days. The type of radiotherapy administered had no influence on relapse at any site or rate of death in remission. All 496 children were randomized to receive chemotherapy for 2 or 3 years with 6-mercaptopurine and methotrexate either as a continuous (group C) or a semicontinuous (group G) regimen or as a five-day pulse every 3 weeks (group I). All groups also received vincristine and prednisolone every 6 weeks. With a minimum follow-up of almost 7 years, patients in group I had significantly fewer remission deaths (P = .025) but a much higher rate of bone marrow relapse than those in group C or G (P = .002). There was an overall benefit for 3 years of chemotherapy compared with 2 years, which in contrast to previous studies, was more apparent in girls and in patients in groups C and G. Testicular relapse occurred in 37 boys, including 19 patients off therapy, with a previously negative biopsy. The overall results confirmed the prognostic significance of initial leucocyte count, even among these standard-risk patients, while girls had a superior rate of disease-free survival, but not of hematologic remission. It is concluded that, even among standard-risk patients, the prognosis is influenced by the height of the initial leukocyte count. While alterations in the fractionation of cranial irradiation do not appear to have influenced disease-free survival, intermittent continuing chemotherapy, although less immunosuppressive, is less effective than conventional continuous therapy in the treatment of ALL. In this study, 3 years of chemotherapy appeared superior to 2 years. 相似文献
7.
8.
9.
10.