全文获取类型
收费全文 | 3230篇 |
免费 | 425篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 57篇 |
儿科学 | 129篇 |
妇产科学 | 259篇 |
基础医学 | 151篇 |
口腔科学 | 147篇 |
临床医学 | 1132篇 |
内科学 | 473篇 |
皮肤病学 | 74篇 |
神经病学 | 111篇 |
特种医学 | 161篇 |
外国民族医学 | 1篇 |
外科学 | 416篇 |
综合类 | 52篇 |
预防医学 | 156篇 |
眼科学 | 114篇 |
药学 | 129篇 |
中国医学 | 11篇 |
肿瘤学 | 91篇 |
出版年
2024年 | 8篇 |
2023年 | 72篇 |
2022年 | 25篇 |
2021年 | 70篇 |
2020年 | 63篇 |
2019年 | 53篇 |
2018年 | 143篇 |
2017年 | 163篇 |
2016年 | 150篇 |
2015年 | 155篇 |
2014年 | 158篇 |
2013年 | 179篇 |
2012年 | 177篇 |
2011年 | 197篇 |
2010年 | 148篇 |
2009年 | 158篇 |
2008年 | 150篇 |
2007年 | 208篇 |
2006年 | 168篇 |
2005年 | 166篇 |
2004年 | 139篇 |
2003年 | 118篇 |
2002年 | 101篇 |
2001年 | 45篇 |
2000年 | 24篇 |
1999年 | 44篇 |
1998年 | 44篇 |
1997年 | 72篇 |
1996年 | 61篇 |
1995年 | 55篇 |
1994年 | 40篇 |
1993年 | 31篇 |
1992年 | 30篇 |
1991年 | 23篇 |
1990年 | 28篇 |
1989年 | 19篇 |
1988年 | 14篇 |
1987年 | 15篇 |
1986年 | 14篇 |
1985年 | 14篇 |
1984年 | 16篇 |
1983年 | 14篇 |
1982年 | 11篇 |
1981年 | 12篇 |
1980年 | 8篇 |
1979年 | 10篇 |
1977年 | 7篇 |
1976年 | 12篇 |
1975年 | 12篇 |
1974年 | 5篇 |
排序方式: 共有3664条查询结果,搜索用时 187 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.
OBJECTIVE: This study was conducted to compare an otolaryngologist's experience with a cohort of epilepsy patients implanted with a vagal nerve stimulator (VNS) to previously published data. METHODS: Demographics, preoperative seizure frequency, medications, and complications were retrospectively collected from patients implanted by the senior author. Postoperative medications and seizure frequency were obtained from referring neurologists. RESULTS: Seventeen patients were implanted over a 24-month period. Average age was 28.3 years. Patients presented with petit mal (n = 3), tonic-clonic (n = 6), complex partial (n = 5), and grand mal (n = 8) seizures. Mean follow-up postimplantation was 13.5 months. Most patients had at least a 50% reduction of seizure frequency, with 3 patients being seizure free. There were no postoperative infections. One patient had left vocal cord immobility. The most common side effect was voice disturbance during device activation. CONCLUSION: Otolaryngologists are well equipped to perform VNS implantation and to diagnose and treat possible laryngeal side effects. EBM rating: C-4. 相似文献
5.
6.
MR compatibility of Guglielmi detachable coils 总被引:6,自引:0,他引:6
7.
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
8.
Yelda Karincaoglu Kadir Batcioglu Tamer Erdem Muammer Esrefoglu Metin Genc 《Journal of oral pathology & medicine》2005,34(1):7-12
BACKGROUND: Despite plenty of research, the cause of recurrent aphthous stomatitis (RAS) remains obscure. It has been proposed that, the aetiological factors such as local trauma, smoking, vitamin deficiencies and viral infections lead to aphthae formation via final common pathway based on increased oxidative stress. The aim of this investigation was to evaluate the antioxidant enzyme superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSHPx) alterations in plasma and saliva, and in addition uric acid (UA) in saliva, in patients with RAS and healthy controls. METHODS: Thirty-two patients with RAS and 30 healthy controls were included into the study. The SOD, CAT, GSHPx and UA levels were measured in plasma and saliva in study and control groups. RESULTS: In the RAS group, although the mean SOD (P<0.001) and CAT (P<0.05) levels of plasma were lower, GSHPx (P<0.001) levels were higher than control group. The salivary concentrations of the SOD (P<0.001), CAT (P<0.05) and GSHPx (P<0.001) in RAS group were entirely opposite to plasma concentrations. UA were not significant between RAS group and controls. CONCLUSION: Since we found salivary SOD and CAT levels were high whereas plasma levels were low, it has been thought that, salivary defence mechanisms via antioxidant agents may be stimulated against to the ulcerous lesion. We consider that the organism might mobilize the antioxidant potential to the sites where they were needed. At this point, decrease of SOD and CAT levels in the plasma may be related to this shift. It is also thought that GSHPx secretion in the saliva may also be increased but the increase in its turnover may be responsible for the diminished activity. 相似文献
9.
10.